C-API Reference v11x and up Functions Reference

The following functions are available to a user in order to interface their application to RT-LAB.

OpalAbortCompile

Group	Model preparation
Description	Stops the currently executing compilation.
Required Control	System control
Usage	int OpalAbortCompile();
Input	None
Output	None
Return value	EOK: Success. EPRM: System control was not granted to this client. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalStartCompile2, OpalDisplayInformation

OpalAddExtraFile

Group	Model Preparation
Description	This function adds a file to the list of files to be transferred or retrieved during one of the following steps: transfer of files during compilation from the host to the target. retrieval of files during compilation from the target to the host transfer of files from the host to the target before the model is loaded retrieval of files from the target to the host after the model is reset
Required Control	Configuration control
Usage	int OpalAddExtraFile (OP_EXTRA_FILE_TRANSFER_TIME transferTime, unsigned short logicalId,char filePathName,OP_FILE_TRANSFER_MODE* fileMode);
Input	transferTime: See OP_EXTRA_FILE_TRANSFER_TIME. logicalID: See Glossary. To specify all subsystem, set the logicalId to 0.file PathName: Extra file path and name. fileMode: File transfer type (ascii or binary). See OP_FILE_TRANSFER_MODE.
Output	None
Return value	EOK: Success. EFAULT: Invalid parameter. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ESRCH: Specified subsystem id not found.
Examples	See example configuration.
Related items	OpalGetExtraFiles, OpalRemoveExtraFile, OP_EXTRA_FILE_TRANSFER_TIME, OP_FILE_TRANSFER_MODE

OpalAddToSelection

Group	Utilities
Description	Given the object's reference ID, adds it to the selected items.
Required Control	None
Usage	int OpalAddToSelection(P_REF_ID *refId);
Input	*refId: Pointer to the reference ID (type UINT_64_T).
Output	None
Return value	EOK: Success.
Examples	None
Related items	None

OpalCloseMetaController

Group	Utilities
Description	Close the currently running MetaController. This function should be called only once all projects have been closed and all clients have disconnected from running simulations. After invoking this function, most API calls will not be operational until the MetaController executable is started again.
Required Control	None
Usage	int OpalCloseMetaController();
Input	None
Output	None
Return value	EOK: Success.
Examples	None
Related items	None

OpalCloseProject

Group	Model Selection
Description	Disconnects the API from the currently connected project and model. The model's state does not change as a result of this call. Any control granted to this client is revoked.
Required Control	None
Usage	void OpalCloseProject(void);
Input	None
Output	None
Return value	None
Examples	See example basic_example1.
Related items	OpalGetActiveProjects, OpalConnect (deprecated), OpalConnectByName (deprecated), OpalSetCurrentModel, OpalOpenProject

OpalCommand

Group	Generic
Description	Run an RT-LAB command for a certain RT-Lab object. See the OP_COMMAND enumeration for a complete list of available commands and their specific requirements.
Required Control	Specific to each command, see OP_COMMAND.
Usage	int OpalCommand (OP_REF_ID ownerId, OP_COMMAND command, int numAttributesIn,OP_ATTRIBUTE attributes[], void * attributeValues[], OP_REF_ID * outputId)
Input	ownerId: The ID of the object that owns the command. Where there is ambiguity, the owner of the two objects is the expected ID. For example CMD_REMOVE: when the owner is a project, the command removes a model. command: The command to be executed numAttributes: The number of attributes to send as arguments for the command. attributes: The array of attributes to send to the command. The size of the array must be equal to the numAttributes argument. May be NULL is numAttributes is 0. attributeValues: The pointer to the array of values to be used as arguments for the command. The type of each value must correspond to the attribute of the same index in attributes. The size of the array must be equal to the numAttributes argument. May be NULL is numAttributes is 0.
Output	outputId The ID corresponding to the object directly affected by the command. If no other object than the parent is affected, the parent ID is returned.
Return value	EOK: Success. EBADF: Unsupported ownerId. EINVAL: Invalid arguments specified. EIO: Error sending the request or receiving the reply. ENOMEM: Error allocation memory for request or reply.
Examples	None.
Related items	OP_COMMAND, OP_ATTRIBUTE.

OpalConnect (deprecated)

Group	Model selection
Description	Connects the API to an active model. Subsequent API calls refer to this model.
Required Control	None
Usage	int OpalConnect(OP_API_INSTANCE_ID instId,unsigned short systemControl, short *modelState);
Input	instId: The id of the model instance to which the connection is to be made. systemControl: True to request control of the model.
Output	modelState: Current state of the model. See OP_MODEL_STATE.
Return value	EOK: Success. EIO: Error sending the request or receiving the reply. ESRCH: Invalid instance id or instance id not found. EPERM: Control requested, but already given to another client. ENOEXEC: Could not connect to model. Not all of the subsystems are still active. EINVAL: Trying to connect to a model whose local and UNC path are both empty. ENOENT: Could not find the original model we are trying to connect to. OP_API_EBAD_CONFIG: Node mapping not valid or IP address of controller machine not specified (environment variable OPAL_META_CTL_IP not set). OP_API_EBAD_PHYS_NODE: Physical node not found. OP_API_EMODEL_CHANGED: The original model has been changed (number of sub-systems, sub-systems names, etc. OP_API_ENO_LICENSE: No license. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx. OP_API_MODEL_IO_ TIMEOUT OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	None
Related items	OpalConnectByName (deprecated), OpalDisconnect (deprecated), OpalOpenProject, OpalCloseProject, OpalGetModelState

OpalConnectByName (deprecated)

Group	Model Selection
Description	Connects the API to an active model. Subsequent API calls refer to this model. When trying to establish a connection with a model when there are multiple models that correspond to the specified ModelName and ModelPath, a window is displayed prompting you to choose a model. This may occur when: modelName is not NULL. The window displays a list of active models with the specified ModelName and ModelPath, unless ReturnOnAmbiguity is set to True1. modelName is not NULL, there is more than one active model with a specified path and name and returnOnAmbiguity is False(0). exactMatch exactMatch modelName returnOnAmbiguity E2BIG
Required Control	None
Usage	int OpalConnectByName (const char modelName,const char modelPath, unsigned short exactMatch, unsigned short systemControl,unsigned short returnOnAmbiguity, OP_API_INSTANCE_ID pInstId, OP_MODEL_STATEpModelState);
Input	modelName: name of the model to which connection is desired modelPath: Path where original model resides. May be NULL; used to resolve ambiguity when more than one model of the same name are active. exactMatch: True(1) to request an exact name match. systemControl: True(1) to request control of the model. returnOnAmbiguity: No window is displayed, an error code (E2BIG) isreturned.
Output	instId: Current active model’s instance ID. See Glossary. modelState: Current model's state.
Return value	EOK: Success. EIO: Error sending the request or receiving the reply. ENOENT: No active model found. OP_API_CMD_CANCELED: Active model(s) found but no model has been selected. ENOSPC: No active model with specified name, path and type. E2BIG: More than 1 active models with specified name and path (only if returnOnAmbiguity is TRUE). EPERM: Control requested, but already given to another client. ENOEXEC: Could not connect to model. Not all of the subsystems are still active. ENOMEM: Internal memory allocation error. OP_API_EBAD_CONFIG: Node mapping not valid or IP address of controllermachine not specified (environment variable OPAL_META_CTL_IP not set). OP_API_EBAD_PHYS_NODE: Physical node not found. OP_API_ECREATE_SHMEM: Could not create shared memory. OP_API_ECREATE_PROCESS: Error launching OpalChooseModel.exe - Error displayingthe dialog box. Process OpalChooseModel.exe is called by this function. This process is placed RTLAB_ROOT\common\bin folder. OP_API_ENO_LICENSE: No license for one or more of RT-LAB components. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx. OP_API_MODEL_IO_ TIMEOUT OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	See the example basic_example1.
Related items	OpalSetCurrentModel, OpalGetActiveProjects, OpalConnect (deprecated), OpalDisconnect (deprecated), OpalOpenProject, OpalCloseProject, OpalGetModelState

OpalCreateAlias

Group	Model Interaction, Alias
Description	Creates a new alias which is used as a reference to an absolute path of a parameter or signal. The alias is appended to the current list of aliases. The alias’s name is a no case-sensitive string that should be unique. It should not contains the following special character: an asterisk (*) and question mark (?). It consists of partitions and a name, or a name only. A partition is an organizational unit, or container, used to organize aliases into a hierarchical structure. Partitions and name of the alias are separated by slash (/) characters. The topmost partition in any partition is called the root partition. A partition that is below another partition is called a subpartition. A partition above a subpartition is called the parent partition. The root partition is a slash (/) characters. Below are examples of valid alias names: myAliasName /myPartition/myAliasName /myRootPartition/myChildrenPartition/myAliasName When using alias’ API functions, many syntaxes is available to refer to one specific alias. For example, an alias called “/myPartition/myAlias” can be referenced with the following syntax: /myPartition/myAlias, myPartition/myAlias or myAlias (required a unique name) Note that the last syntax is only available if no other partitions contain an alias with the name “myAlias”.With Matlab/Simulink, the absolute path of a parameter is the concatenation of the path of the block that contains the parameter and the name of the parameter. Below are examples of parameter’s paths of a SineWave block: Subsystem/SineWave/Amplitude Subsystem/SineWave/Frequency By analogy, with Matlab/Simulink, the absolute path of a signal is the concatenation of the path of the block that outputs the signal and the signal’s label. If the label is empty in the Simulink model, the port’s name that outputs the signal is used instead of the label. Below are examples of paths for a signal at the outport 1 of a SineWave block: Subsystem/SineWave/Amplitude Subsystem/SineWave/Frequency By analogy, with Matlab/Simulink, the absolute path of a signal is the concatenation of the path of the block that outputs the signal and the signal’s label. If the label is empty in the Simulink model, the port’s name that outputs the signal is used instead of the label. Below are examples of paths for a signal at the outport 1 of a SineWave block: SubSystem/SineWave/MySignalLabel, or SubSystem/SineWave/Port1 Note that any of the following kind of signals can be referenced: control signals, acquisition signals, and dynamic signals.
Required Control	System control
Usage	int OpalCreateAlias(const char * aliasName,const char * referencePath);
Input	aliasName: Name of the alias. It must be unique. referencePath: Absolute path of the parameter or signal referenced by the alias. This path must exist in the model.
Output	None
Return value	EOK: Success. EPERM: System control has not been granted to this client. EINVAL: The reference path of the parameter or signal is not found in the model. EACCES: The alias already exists. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples
Related items	OpalRemoveAlias, OpalLoadAlias, OpalSaveAlias, OpalGetValueByAlias, OpalSetValueByAlias.

OpalCreatePackage

Group	Utilities
Description	Creates a package (zip) ready to be deployed on a target for executing the current model using API. The project must be first open (cf. OpalOpenProject) and loadable before calling this function.
Required Control	System control (OP_FB_SYSTEM)
Usage	int OpalCreatePackage(const char *packageName, const OP_TARGET_PLATFORM targetPlatform);
Input	packageName: Absolute file path of the package to be created targetPlatform: See OP_TARGET_PLATFORM.
Output	None
Return value	EOK: Success. OP_API_INVALID_PARAMETER: Missing packageName OP_API_OUT_OF_MEMORY: Not enough memory OP_API_BAD_PATH: Invalid packageName OP_API_NOT_ENOUGH_PRIVILEGE: System Control not granted OP_API_INVALID_TARGET_PLATFORM: Target platform not supported OP_API_ENO_MODEL_NOT_LOADABLE: Missing model compilation
Examples	None
Related items	OpalOpenProject, OP_TARGET_PLATFORM

OpalDeleteConnHandle

Group	Model selection
Description	The specified handle must have been obtained from OpalGetConnHandle or OpalNewConnHandle. The specified connection is deleted. If connected, it is disconnected before deleting.
Required Control	None
Usage	int OpalDeleteConnHandle(unsigned long handle);
Input	handle of a connection
Output	None
Return value	EOK: success ENOMEM: memory allocation error E2BIG: too many open connections for this process
Examples	See multi_models
Related items	OpalNewConnHandle, OpalGetConnHandle, OpalSetConnHandle

OpalDisconnect (deprecated)

Group	Model Selection
Description	Disconnects the API from the currently connected model. The model's state does not change as a result of this call. Any control granted to this client is revoked.
Required Control	None
Usage	void OpalDisconnect(void);
Input	None
Output	None
Return value	None
Examples	See example basic_example1.
Related items	OpalGetActiveProjects, OpalConnect (deprecated), OpalConnectByName (deprecated), OpalSetCurrentModel, OpalOpenProject, OpalCloseProject

OpalDisplayInformation

Group	Utilities
Description	Gets the compilation or execution messages as well as return the compilation or execution status. You must call OpalRegisterDisplay before calling this function to indicate to the controller to send messages to the client.
Required Control	None
Usage	int OpalDisplayInformation(char results,unsigned short bufLen, int timeout,unsigned short done, unsigned short *displayId);
Input	bufLen: Available buffer size in bytes (provided by the caller). Minimum recommended size is 512 bytes. timeout: Milliseconds to wait for available results. 0 = do not wait.OP_API_INFINITE = block for available results.
Output	done: Status of the compilation or the execution. Return True if the compilation has completed or execution has been reset. displayId: Message’s source 0: compilation 1: Master subsystem 2+: Slave subsystems results: Buffer supplied by the caller where the API stores the available messages. Can be NULL if results are not desired. Compilation or execution messages are a C string (terminated by a '\0').
Return value	EOK: Success. EAGAIN: No more information to display. OP_API_ESEPARATION: Error while separating the model's subsystems. OP_API_ECODE_GENERATION: Error while generating code for the subsystems. EPERM: System control had not been granted to this client. EBUSY: Model executables already loaded. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx.
Examples	See example compilation.
Related items	OpalRegisterDisplay

OpalExecute

Group	Model Execution
Description	Starts execution of the currently connected model. When in real-time mode, the execution rate is the model's sampling rate times the time factor.
Required Control	System Control
Usage	int OpalExecute(double timeFactor);
Input	timeFactor: See Glossary
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: Model not loaded. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. OP_API_MODEL_IO_TIMEO UT OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	See example basic_example1.
Related items	OpalPause, OpalGetSystemControl

OpalExecuteConsole

Group	Model Interaction, Console
Description	Starts execution of the Simulink console subsystem associated with the current connected model. Before calling this function, the client must call OpalLoadConsole. Please note that this function is only available on Windows and Linux operating system when the model contains a Simulink console subsystem. The client machine must have Matlab install.
Required Control	None
Usage	int OpalExecuteConsole();
Input	None
Output	None
Return value	EOK: success EBADF: model not specified by previous OpalConnect or OpalSetCurrentMode EINVAL: not a Simulink model EIO: error sending the request or receiving the reply ENOENT: the model path and/or name is NULL EACCES: cannot access the modelname.subsys file (this file is generated during the model’s compilation) OP_API_SEPARATION: the model doesn’t contain a Simulink console subsystem or the format of the *.subsys file is incorrect (this file is generated during the model’s compilation).
Examples	None
Related items	OpalLoadConsole, OpalPauseConsole, OpalResetConsole, OpalStopConsole

OpalExecuteMatlabCmd

Group	Utilities
Description	Sends a command to Matlab and returns Matlab's messages. If Matlab has not been started yet, the function starts Matlab before sending the command.
Required Control	None
Usage	int OpalExecuteMatlabCmd (char cmd,char result,unsigned short resultBufferLen);
Input	cmd: Matlab command to be executed. resultBufferLen: Size (in chars) of the pResult buffer parameter.
Output	result: Messages returned by Matlab. You must create this array.
Return value	EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: Model is of a type for which this operation is not supported. EFAULT: Invalid parameter.
Examples	See example matlab_analysis.
Related items	None

OpalFindObjectId

Group	Utilities
Description	Given the object's path and type, returns the Object ID.
Required Control	None
Usage	int OpalFindObjectId(OP_OBJECT_TYPE objectType, const char path, OP_REF_ID refId);
Input	objectType: Object type (enum → OP_T). path: Pointer to the path. refId: Pointer to the reference ID (type UINT_64_T).
Output	None
Return value	EOK: Success.
Examples	None
Related items	None

OpalFreeMemory

Group	Utilities
Description	Free memory allocated by a previous API call.
Required Control
Usage	int OpalFreeMemory(void *pMemory);
Input	pMemory: Pointer to memory to be freed.
Output	None
Return value	EINVAL: Invalid parameter.
Examples	None
Related items	None

OpalGetAcqBlockLastVal

Group	Model Configuration, Acquisition
Description	Get the current settings for the blocking / non-blocking, and associated last value flag, for signal acquisition. This information is used by the API acquisition functions, which have the option not to wait for data, needed by some console's lack of multiple thread support. These settings apply to the current model. These settings only apply to the command station from which this call is made.
Required Control	None
Usage	int OpalGetAcqBlockLastVal(short blockOnGroupshort lastValues);
Input	None
Output	blockOnGroup: Acquisition group for which the API functions will wait for data (specify n for group n).If 0, API function will wait for data for all groups.If -1, API functions will not wait for any group's data. lastValues: Boolean, 1 means API functions will output the last values received while a group's data is not available. If 0, the API function will output zeroes. This paramater is ignored when blockOnGroup is not egal to -1
Return value	EOK: success ENOMEM: memory allocation error EBADF: model not specified by previous OpalConnect EIO: error sending the request or receiving the reply from Controller
Examples	None
Related items	OpalSetAcqBlockLastVal

OpalGetAcqGroupSignals

Group	Model Interaction, Signal Acquisition
Description	Returns the acquisition signals sent to the console subsystem while the model is running. The acquisition signals are the signals sent from the computation nodes to console subsystem in the same order that it was specified at the input of the OpComm block for the specified acquisition group. Observes the blocking / non-blocking properties set for the workstation: if blocking is set, will block until data is available; if non-blocking is set, will return EAGAIN when no data is available. In this case, returned values will be equal to zero or last received values depending on the settings specified by the OpalSetAcqBlockLastVal API function. For additional information, please see Acquiring and Viewing Data in the RT-LAB User’s Guide.
Required Control	None
Usage	int OpalGetAcqGroupSignals(unsigned short acqGroup,unsigned short allocatedSignals, unsigned int numSignals, double values[],unsigned short lastValues, double *timestep);
Input	acqGroup: Acquisition group number, starts from 0. allocatedSignals: Number of expected signals.
Output	numSignals: number of signals in values signals array values: Simulation signals array into which the API will store the acquired signals. May be NULL if allocatedSignals equals 0. lastValues: Pointer to where API stores true when signals are the last in the acquisition buffer (next values will be in a new frame). May be NULL if not of interest. timestep: Simulation timestep of the acquired data. May be NULL if not of interest.
Return value	EOK: Success. E2BIG: Number of allocated signals is less than the number of group signals. EAGAIN: No data available and the timeout has expired. EINVAL: Specified acquisition group is invalid or not active (does not exist on target). EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EACCES: Not connected a loaded model. ENOMEM: Memory allocation error. OP_API_EBAD_SIGNAL: Doing acquisition of one or more dynamic signals that does no longer exist. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx. OP_API_EACQ_MODEL_PAUSED: no data available because the model is paused.
Examples	None
Related items	None

OpalGetAcqGroupSyncSignals

Group	Model Interaction, Signal Acquisition
Description	Returns the acquisition signals sent to the console subsystem while the model is running. The acquisition signals are the signals sent from the computation nodes to console subsystem in the same order that it was specified at the input of the OpComm block for the specified acquisition group. The outputs contain two arrays: acquisition signals + monitoring signals. The user can activate the synchronization algorithm to synchronize the acquisition time with the simulation time by inserting data during missed data intervals. The interpolation can be used in this case to get a better result during missed data intervals. Threshold time between acquisition time and simulation time exceeds the threshold, the acquisition (console) will be updated to overtake the difference. The acqtimestep offers the user a way to change his console step size as in Simulink. For additional information, please see Acquiring and Viewing Data in the RT-LAB User’s Guide. Monitoring signals array contains 4 values: missed data: number of values between two acquisition frame. If the value is 0, there are no missing data between the two frames. Missing data may appear if network communication and display are too slow to refresh the value generated by the model. offset: simulation time when the acquisition started. target simulation time: simulation time of the model when the acquisition has been done. Sample/sec: number of sample/sec received from target. The calculation is made for one sample. Ex: If the model is running at 0.001s, sample/sec value should not exceed 1000 sample/sec.
Required Control	None
Usage	int OpalGetAcqGroupSyncSignals(unsigned short acqGroup,unsigned short allocatedSignals, unsigned int numSignals, unsigned short synchronization, unsigned short interpolation, double threshold,double acqTimeStep, double simSignals, double monSignals,unsigned short endFrame, double *simTimeStep);
Input	acqGroup: Acquisition group number starts from 0. allocatedSignals: Number of expected signals. synchronization: 1/0 = Enable/DisableEnables the synchronization algorithm for a given acquisition group. This algorithm must be used if synchronization is required between acquisition Console time and simulation time. In case of a synchronization problem, the Console detects missing data from the target node and the algorithm either replaces the lost data with the last signal value received or interpolates the data. interpolation: interpolation 1/0 = Enable/Disable In case of missed data from a computation subsystem, the synchronization algorithm interpolates data during a range of data loss. The following illustrations make this point clear. The display at left indicates no interpolation during data acquisition while the display at right indicates interpolation between two frames during data loss. threshold: Difference between the simulation Console time and the simulation target time. Whenever this difference is exceeded, the synchronization algorithm stops interpolating and re-synchronizes to the new value. acqTimeStep: Sample interval: acquisition (console) timestep must be equal to or greater than the model time step.
Output	numSignals: Number of signals in the acquisition group. simSignals: Simulation signals array into which the API will store the acquired signals. May be NULL if allocatedSignals equals 0. monSignals: Monitoring signals array into which the API will store the monitoring signals (Missed data, offset, target simulation time, Samples/sec). May be NULL if allocatedSignals equals 0. endFrame: Pointer to where API stores true when signals are the last in the acquisition buffer (next values will be in a new frame). May be NULL if not of interest. simTimeStep: Simulation timestep of the acquired data. May be NULL if not of interest.
Return value	EOK: Success. E2BIG: Number of allocated signals is less than the number of group signals. EAGAIN: No data available and the timeout has expired. EINVAL: Specified acquisition group is invalid or not active (does not exist on target). EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EACCES: Not connected a loaded model. ENOMEM: Memory allocation error. OP_API_EBAD_SIGNAL: Doing acquisition of one or more dynamic signals that does no longer exist. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx.
Examples	See example acquisition1.
Related items	None

OpalGetAcqSampleTime

Group	Model Configuration, Acquisition
Description	Get the acquisition sample time for the specified group. The acquisition sample time is the interval between two values inside an acquisition frame.
Required Control	None
Usage	int OpalGetAcqSample Time(unsigned short acqGoup,double *sampleTime);
Input	acqGroup: acquisition group starting at 1.
Output	sampleTime: acquisition group sample time
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	None

OpalGetAcqTrigger

Group	Model Configuration, Acquisition
Description	Get the dynamic acquisition trigger that will be used during the simulation. Data will be acquired only when a specific signal is triggered.
Required Control	None
Usage	int OpalGetAcqTrigger( unsigned short acqGroup,unsigned int signalNameLength, const char signalName,double level,unsigned int trigSignalNameLength, const char trigSignalName,int offset,OP_TRIGGER_CONDITION condition, unsigned char triggerEnabled, unsigned short *trigType);
Input	acqGroup: Acquisition group (numbering starts at 0).
Output	signalNameLength: Length of the signal to be triggered. signalName: Name of the triggered signal. level: Value that must be reached by the trigger signal to trigger acquisition. trigSignalName: Name of the triggering signal. If “level” is specified thentrigSignalName is NULL. offset: Number of steps (cycles) to wait before starting the acquisition system. condition: Condition to be satisfied so that the acquisition system is triggered. See OP_TRIGGER_CONDITION. triggerEnabled: Specified if the dynamic trigger is enabled or disabled (1/0 =Enable/Disable). triggerType: Type of trigger that will start the acquisitionTRIG_BY_SIGNAL(0) / TRIG_BY_VALUE(1).
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EINVAL: invalid acquisition group. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. E2BIG: Too many open connections for this process.
Examples	None
Related items	OpalSetAcqTrigger

OpalGetAcquisitionControl

Group	Model Configuration, Acquisition
Description	Requests or releases the acquisition control of the currently connected model. Acquisition control enables the client API to control the model's acquisition parameters for a specific acquisition group. Only one client API at a time is granted acquisition control for a specific acquisition group.
Required Control	None
Usage	int OpalGetAcquisitionControl(unsigned short acqControl,unsigned short acqGroup);
Input	acqControl True(1): to request acquisition control for the specified acquisition group, False(0): to release its control. acqGroup: Group for which acquisition control is requested (numbering starts at 0).
Output	None
Return value	EOK: Success. EPERM: Control requested but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: Invalid acquisition group.
Examples	See example dynamic_acq.
Related items	None

OpalGetActiveModels (deprecated)

Group	Model Selection
Description	*Note*: This function is for backward compatibility only. Please consider using *OpalGetActiveProjects* instead. Returns a list of active models (see Glossary). The returned names include the file extension (if any) of the original model file. If the allocated storage is too small for the number of models, or for the longest name or longest path, none of the names, paths or instance Ids are returned, but the numModels, maxNameLen and maxPathLen values are set, and the return value is E2BIG. An application can use this fact to specify lengths of 0 on a first call, allocate the required storage and issue a second call to get the information.
Required Control	None
Usage	int OpalGetActiveModels(unsigned sFindObjectIdhort allocatedModels,unsigned short numModels, unsigned short allocatedNameLen, unsigned short maxNameLen, unsigned short allocatedPathLen, unsigned short maxPathLen, char name[],char *path[], OP_API_INSTANCE_ID instId[]);
Input	allocatedModels: number of models for which storage was allocated by the caller for the names, paths and instance ids. allocatedNameLen: allocated length of storage to receive the names allocatedPathLen: allocated length of storage to receive the paths
Output	numModels: pointer to where the API will store the actual number of active models. maxNameLen: pointer to where the API will store the length of the longest name. maxPathLen: pointer to where the API will store the length of the longest path. name: array of strings where the API will store the names of the active models (includes the extension). path: array of strings where the API will store the paths of the active models. instId: array where the API will store the instance Ids of the active models.
Return value	EOK: Success. EIO: Error sending the request or receiving the reply. E2BIG: specified storage not big enough to receive values ENOMEM: Internal memory allocation error. OP_API_EBAD_CONFIG: Node mapping not valid or IP address of the controller machine not specified (environment variable OPAL_META_CTL_IP not set).
Examples	None
Related items	OpalGetActiveProjects, OpalDisconnect, OpalSetCurrentModel, OpalConnectByName

OpalGetActiveProjects

Group	Model Selection
Description	Returns a list of active projects. For each project, this function returns the full path of the configuration file, the name and the IP address of the machine that opened this project, the instance ID of the current project session, and the list of models belonging to this project. For each model, path, ID and state are returned. If the allocated storage is too small for any of the arguments, none of the lists are returned, but the numProjects, numModels, maxProjectPathLen, maxModelPathLen, maxMachineNameLen and maxIpLen values are set, and the return value is E2BIG. An application can use this fact to specify lengths of 0 on a first call, allocate the required storage and issue a second call to get the information.
Required Control	None
Usage	int OpalGetActiveProjects(unsigned short allocatedProjects,unsigned short numProjects, unsigned short allocatedModels, unsigned short numModels,unsigned short allocatedProjectsPathLen, unsigned short maxProjectPathLen, unsigned short allocatedModelPathLen, unsigned short maxModelPathLen, unsigned short allocatedMachineNameLen, unsigned short maxMachineNameLen, unsigned short allocatedIpLen,unsigned short maxIpLen, char projectPaths[], unsigned short instanceIDs[], char machineNames[],char controllerIPs[], char modelPaths[],unsigned short numModelsPerProject[] unsigned short modelIDs[],unsigned short modelStates[]);
Input	allocatedProjects: number of projects for which storage was allocated by the caller for the paths, machine name, IP addresses and instance ids. allocatedModels: number of models for which storage was allocated by the caller for the names, paths and instance ids. allocatedProjectPathLen: allocated length of storage to receive the project paths allocatedModelPathLen: allocated length of storage to receive the model paths allocatedMachineNameLen: allocated length of storage to receive the machine names allocatedIpLen: allocated length of storage to receive the IP addresses
Output	numProjects pointer to where the API will store the actual number of active projects. numModels pointer to where the API will store the actual total number of models for all active projects. maxProjectPathLen pointer to where the API will store the length of the longest project path. maxModelPathLen pointer to where the API will store the length of the longest model path. maxMachineNameLen pointer to where the API will store the length of the longest machine name. maxIpLen pointer to where the API will store the length of the longest IP address. projectPaths array of strings where the API will store the paths of the active projects’ configuration files. instanceIDs array where the API will store the instance Ids of the active projects. machineNames array where the API will store the machine names. controllerIPs array where the API will store the IP addresses. modelPaths array where the API will store the model paths of all active projects. numModelsPerProject array where the API will store the number of models for each project. Use these values to determine what model belongs to what project. modelIDs array where the API will store the model IDs for all active projects. modelStates array where the API will store the model states for all active projects.
Return value	EOK: Success. EIO: Error sending the request or receiving the reply. E2BIG: specified storage not big enough to receive values ENOMEM: Internal memory allocation error. OP_API_EBAD_CONFIG: Node mapping not valid or IP address of the controller machine not specified (environment variable OPAL_META_CTL_IP not set).
Examples	None
Related items	OP_COMMAND(OpenProject),OP_COMMAND (CloseProject), OpalDisconnect, OpalSetCurrentModel, OpalConnectByName

OpalGetAliasDescription

Group	Model Interaction, Alias
Description	Returns the set of information of aliases active for the current model. Specifying a pattern ensures that only matching alias information is returned. Wildcard characters (?,*) may be used in the pattern. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetAliasDescription(const char * aliasNamePattern,int * numberAlias, OP_ALIAS_INFO ** aliasInfo);
Input	aliasNamePattern: See Glossary
Output	numberAlias: The number of aliases returned in the structure. aliasInfo: List of aliases' structure returned. See OP_ALIAS_INFO
Return value	EOK: Success. ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EINVAL: Alias with the specified path is not found.
Examples	None
Related items	OpalCreateAlias, OpalLoadAliasDescription, OP_ALIAS_INFO

OpalGetAttributes

Group	Generic
Description	Get the values of some object attributes. See the OP_ATTRIBUTE enumeration for a complete list of available attributes.
Required Control	None
Usage	int OpalGetAttributes (int numAttributes, OP_REF ids[], OP_ATTRIBUTE attributes [], void ** attributeValues[]);
Input	numAttributes:The number of attributes to retrieve ids: The array of object ids on witch the GetAttributes function will act. The size of the array must be equal to the numAttributes argument. attributes: The array of attributes to get on the corresponding objects specified with the ids argument. The size of the array must be equal to the numAttributes argument.
Output	attributesValues: The address where the GetAttributes function will store the array of pointers to the attribute values.
Return value	EOK: Success. EINVAL: Invalid arguments specified. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Unable to allocate memory for the attributeValues array.
Examples	None
Related items	OpalSetAttributes, OpalGetDefaultAttributes, OpalRestoreAttributes, OP_ATTRIBUTE.

OpalGetBlob

Group	Model Interaction, Blobs
Description	Receives blobs from all registered target subsystems. Memory for output structures (blobs) is allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetBlob(const char pszId,OP_GET_BLOBS *ppBlobs);
Input	pszId ID (name) of the blob to request.
Output	ppBlobs: pointer to the blob to receive. see OP_GET_BLOBS
Return value	EOK: Success. EPERM: Control requested but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. EAGAIN: Model not loaded. ENOENT: No function registered on target for this blob ID. E2BIG: Blob to receive is too big. EACESS: one or more subsystems registered for this blob ID is running in XHP mode. EINVAL: Invalid blob or blob ID. OP_API_MODEL_IO_ TIMEOUT: Timeout waiting for reply from the model. OP_API_MODEL_IO_ ERROR: Model is missing some or all processes or subsystems.
Examples	None
Related items	OpalSendBlob, OP_GET_BLOBS

OpalGetBlobsControl

Group	Model Interaction, Blobs
Description	Requests or releases the blobs control of the currently connected model. Blob control enables the client API to send blobs to the running model. Only one client API at a time is granted blobs control.
Required Control	None
Usage	int OpalGetBlobsControl(unsigned short blobsControl);
Input	blobsControl: True(1) to request blobs control of the model, False(0) torelease its control.
Output	None
Return value	EOK: Success. EPERM: Control requested but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error.
Examples	None.
Related items	OpalGetBlob, OpalSendBlob

OpalGetChildren

Group	Generic
Description	Get the reference IDs of an object’s children.
Required Control	None
Usage	int OpalGetChildren (OP_REF_ID ownerId, int * numChildren, OP_REF_ID * ids[])
Input	ownerId: The ID of the object that owns the children.
Output	numChildren: The number reference IDs returned. ids: The array of reference IDs to address each of the owner’s children directly.
Return value	EOK: Success. EINVAL: Invalid argument specified. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Unable to allocate memory for the attributeValues array.
Examples	None
Related items	OpalCommand, OP_OBJECT_TYPE.

OpalGetClockPeriodInfo

Group	Utilities
Description	Returns the ClockPeriod related information associated with the current model. This function is only valid for QNX 6.x models (not supported anymore).
Required Control	None
Usage	int OpalGetClockPeriodInfo (OP_CLOCK_PERIOD_INFO * const pInfo);
Input	pInfo: The ClockPeriod information associated with the current model.
Output	None
Return value	EOK: Success. EINVAL: Invalid parameter value. EPERM: Not a QNX 6.x model.
Examples	None.
Related items	OP_CLOCK_PERIOD_INFO, OpalSetClockPeriodInfo

OpalGetConfigurationControl

Group	Model Configuration, System
Description	Requests or releases the control of the currently connected model. Configuration control enables the client API to change the configuration (OP_GLOBAL_SETTING_FILE) of the model to which it is connected. Only one client API at a time is granted configuration control.
Required Control	None
Usage	int OpalGetConfigurationControl(unsigned short configControl, const char *password);
Input	configControl: 1 - reserve the control0 - release the control, password optional password: Configuration control password.
Output	None
Return value	EOK: Configuration control granted. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EPERM: Configuration control refused. EACCES: Incorrect password. EINVAL: Password key not found in the file. ENOENT: Problem with the configuration file. ENOMEM: Not enough memory.
Examples	None
Related items	OpalConnect, OpalSetCurrentModel

OpalGetConnectionPointsForIO

Group	Connections
Description	Returns the set of information of datapoints for the IO provided. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetConnectionPointsForIO(const char* syncExchangerName, const char* includeFilter, const char* excludeFilter, unsigned int numCnx, OP_DATAPOINT_INFO* connectionPoints)
Input	syncExchangerName: [optional] name of the IO includeFilter: [optional] include filter for the datapoints name excludeFilter: [optional] exclude filter for the datapoints name
Output	numCnx: number of connections. connectionPoints: List of datapoint structures returned. Size of the list is numCnx. See OP_DATAPOINT_INFO
Return value	EOK: Success. EINVAL: Invalid parameter ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpenProject.
Examples
Related items	OP_DATAPOINT_INFO

OpalGetConnectionsDescription

Group	Connections
Description	Returns the set of information of connections for the current model. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetConnectionsDescription (unsigned int numCnx, OP_CONNECTION_INFO *cnxInfo);
Input	None
Output	numCnx: number of connections. cnxInfo: List of connections’ structures returned. Size of the list is numCnx. See OP_CONNECTION_INFO
Return value	EOK: Success. ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpenProject.
Examples
Related items	OP_CONNECTION_INFO

OpalGetConnHandle

Group	Model selection
Description	Returns an opaque handle associated with the current connection. This handle can be passed back to a subsequent OpalSetConnHandle. If there is no current connection, one is created.
Required Control	None
Usage	int OpalGetConnHandle(unsigned long *pHandle);
Input	None
Output	pHandle: handle of the current connection
Return value	EOK: success ENOMEM: memory allocation error E2BIG: too many open connections for this process
Examples	See multi_models
Related items	OpalDeleteConnHandle, OpalNewConnHandle, OpalSetConnHandle

OpalGetControlSignals

Group	Model Interaction, Control Signals
Description	Returns the current values of the control signals (see Glossary) sent to the computation nodes. These signals can be set by a call to OpalSetControlSignals.
Required Control	None
Usage	int OpalGetControlSignals(unsigned short logicalId,unsigned short allocatedSignals, unsigned short *numSignals, double values[]);
Input	logicalId: See Glossary. allocatedSignals: Number of expected signals.
Output	numSignals: Number of signals in the group. values: User defined array where the API stores the returned list of signal values.
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EINVAL: Model is not loaded, or invalid logicalId. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. E2BIG: Specified storage not big enough to receive values.
Examples	See example control_signal.
Related items	OpalSetControlSignals

OpalGetControlSignalsDescription

Group	Model Interaction, Signals
Description	Returns a set of basic information for each control signal (see Glossary). If there is no connection from the console to the specified subsystem, returns EOK and sets numSignals to 0. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetControlSignalsDescription(int pSignalCnt,OP_SIGNAL_INFO *ppSignalInfoList);
Input	None
Output	pSignalCnt: Number of control signals returned. ppSignalInfoList: List of control signals' description returned. See OP_SIGNAL_INFO.
Return value	EOK: Success. EPERM: Control requested, but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: Invalid parameters
Examples	See example control_signal.
Related items	OpalGetControlSignals

OpalGetCurrentModel

Group	Model Selection
Description	Returns the path and the filename of the current model i.e. the model used by the current API.
Required Control	None
Usage	int OpalGetCurrentModel (char modelPath,char modelName);
Input	None
Output	modelPath: Path of the current model (where the path is as seen by the controller on host computer). modelName: Name of the original model with the extension.
Return value	EOK: Success. EINVAL: No current active model
Examples	None
Related items	OpalSetCurrentModel.

OpalGetDefaultAttributes

Group	Generic
Description	Get the default values of some object attributes. See the OP_ATTRIBUTE enumeration for a complete list of available attributes.
Required Control	None
Usage	int OpalGetDefaultAttributes (int numAttributes, OP_REF ids[], OP_ATTRIBUTEattributes [], void *** attributesValues);
Input	numAttributes: The number of attributes to retrieve ids: The array of object ids on witch the GetDefaultAttributes function will act. The size of the array must be equal to the numAttributes argument. attributes: The array of attributes to get on the corresponding objects specified with the ids argument. The size of the array must be equal to the numAttributes argument.
Output	attributesValues: The address where the GetAttributes function will store the pointer of the attribute values.
Return value	EOK: Success. EINVAL: Invalid arguments specified. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalGetAttributes, OpalSetAttributes, OpalRestoreAttributes, OP_ATTRIBUTE

OpalGetExtraFiles

Group	Model Preparation
Description	Returns the list of files to be transferred or retrieved during one of the following steps: transfer of files during compilation from the host to the target. retrieval of files during compilation from the target to the host transfer of files from the host to the target before the model is loaded retrieval of files from the target to the host after the model is reset Memory for output structures (extraFiles) is allocated by the RT-LAB API. You must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetExtraFiles (OP_EXTRA_FILE_TRANSFER_TIME transferTime, unsigned short logicalId, OP_EXTRA_FILE ** extraFiles, unsigned short * nbFiles);
Input	transferTime: Specifies the moment during model compilation or load when the specified extra file is to be transferred or retrieved. logicalId: See Glossary. To specify all subsystem, set the logicalId to 0.
Output	extraFiles: Extra file structure list. See OP_EXTRA_FILE.nb Files: Number of files in the extraFiles structure
Return value	EOK: Success. EFAULT: Invalid parameter. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ESRCH: Specified subsystem id not found.
Examples	See example configuration model.
Related items	OpalAddExtraFile, OpalRemoveExtraFile, OpalFreeMemory, OP_EXTRA_FILE_TRANSFER_TIME, OP_EXTRA_FILE

OpalGetInstalledMatlabReleases

Group	Utilities
Description	Returns the list of Matlab releases that currently installed on this computer.
Required Control	None
Usage	int OpalGetInstalledMatlabReleases(OP_MATLAB_VERSION releaseList[],int * numReleases)
Input	releaseList: Allocated array to store the result list. numReleases: Number of elements allocated in releaseList.
Output	releaseList: Returned list of installed Matlab releases. numReleases: Number of installed releases.
Return value	EOK: success E2BIG: not enough elements allocated in releaseList. numReleases has been EINVAL: error reading Windows registry
Examples	None
Related items	None

OpalGetIOInterfaces

Group	Connections
Description	Returns the set of information for IO interfaces of the project. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetIOInterfaces(const char* driverNamePattern, unsigned int* numDrivers, OP_DRIVER_INFO** driversInfo)
Input	driverNamePattern: [optional] filter for the IO
Output	numDrivers: number of IO interfaces. driversInfo: List of IO interfaces structures returned. Size of the list is numDrivers. See OP_DRIVER_INFO
Return value	EOK: Success. EINVAL: Invalid parameter ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpenProject.
Examples
Related items	OP_DRIVER_INFO

OpalGetLastErrMsg

Group	Utilities
Description	Returns a message which may have been stored when the last API call was done. This message is cleared or overwritten by subsequent operations. This call itself does not modify the stored message. An application can either preallocate a buffer of sufficient length for anticipated messages, or call this function with bufLen = 0 to retrieve the message length in msgLen, then allocate the required buffer.
Required Control	None
Usage	int OpalGetLastErrMsg(char buf,unsigned short bufLen, unsigned short msgLen);
Input	bufLen: Size of the specified buffer.
Output	buf: Pointer to a buffer where the stored message, if any, is stored. The message is truncated if it is longer than the available buffer length. msgLen: Pointer to where the API stores the length of the stored message. (Can be NULL if not of interest. msgLen does not count terminating '\0' character).
Return value	None
Examples	None
Related items	Error Codes on page 335

OpalGetModelState

Group	Model Execution
Description	Returns the state of the currently connected model and its simulation mode.
Required Control	None
Usage	int OpalGetModelState(OP_MODEL_STATE modelState, unsigned short realTimeMode);
Input	None
Output	modelState: The state of the model. See OP_MODEL_STATE. Thisparameter can be NULL if not of interest. realTimeMode: The real-time mode of the model. See OP_REALTIME_MODE.This parameter can be NULL if not of interest.
Return value	EOK: Success. EINVAL: Not connected to model controller. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	See example basic_example1.
Related items	OP_MODEL_STATE, OP_REALTIME_MODE

OpalGetMonitoringControl

Group	Model Interaction, Monitoring
Description	Requests or releases the monitoring control of the currently connected model. Monitoring control allows the client API to take and restore snapshot and also to configure the monitoring settings. Only one client API at a time is granted monitoring control.
Required Control	None
Usage	int OpalGetMonitoringControl(unsigned short monitoringControl);
Input	monitoringControl: True(1) to request monitoring control of the model, False(0)to release its control.
Output	None
Return value	EOK: Success. EPERM: Control requested, but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. ESRCH: Model instance id not found.
Examples	See example snapshot.
Related items	OpalSnapshot

OpalGetNodeCpu

Group	Model Preparation
Description	Get the cpu assignment option for a list of subsystems of the current model. Cpu assignment is not available for NT target.
Required Control	None
Usage	int OpalGetNodeCpu (unsigned short numSubsys,char subsysName[], char cpuOption);
Input	numSubsys: Number of subsystems for which the cpu assigment is read. subsysName: Array of the subsystem names.
Output	cpuOption: Cpu number assigned to the subsystem. -1 value meansautomatic mode.
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOENT: Invalid subsystem name found in subsysName list parameter.
Examples	None
Related items	OpalSetNodeCpu

OpalGetNodeXHP

Group	Model Preparation
Description	Get the XHP mode option for a list of subsystems of the current model.
Required Control	None
Usage	int OpalGetNodeXHP (unsigned short numSubsys,char subsysName[], char XHPOption);
Input	numSubsys: Number of subsystems for which the XHP option is read. subsysName: Array of the subsystem names.
Output	list of boolean values showing the XHP mode for the corresponding subystem.FALSE (0) means subsystem will not run in XHP mode. TRUE (1) means the subsystem will run in XHP mode.
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOENT: Invalid subsystem name found in subsysName list parameter.
Examples	None
Related items	OpalSetNodeXHP

OpalGetNumAcqGroups

Group	Model Configuration, Acquisition
Description	Returns the number of acquisition groups for the connected model.
Required Control	None
Usage	int OpalGetNumAcqGroups(unsigned short *numAcqGroups);
Input	None
Output	numAcqGroups number of acquisition group
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	None

OpalGetNumSignalsForGroup2

Group	Model Configuration, Acquisition
Description	Returns the number of signals for the specified acquisition group.
Required Control	None
Usage	int OpalGetNumSignalsForGroup2(unsigned short acqGroup,unsigned short numSigValues, unsigned short maxNumDynSigValues, unsigned short *numDynSigValues);
Input	acqGroup: Acquisition group (numbering starts at 0).
Output	numSigValues: Number of fixed signal values assigned to the specified acquisition group. May be NULL. maxNumDynSigValues: Maximum number of dynamic signal values set for this group. May be NULL. maxDynSigValues: Effective number of dynamic signal values set for the specified acquisition group. May be NULL.
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: Specified acquisition group is invalid or not active (does not exist on target). ENOMEM: Memory allocation error.
Examples	None
Related items	None

OpalGetParameterControl

Group	Model Interaction, Parameters
Description	Requests or releases the parameter control of the currently connected model. Parameter control allows the client API to change the values of models' parameters. Only one client API at a time is granted parameter control.
Required Control	None
Usage	int OpalGetParameterControl(unsigned short paramControl);
Input	paramControl: True(1) to request control of model parameters, False(0) torelease control.
Output	None
Return value	EOK: Success. ENOMEM: Memory allocation error. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EPERM: Could not get parameters control. EIO: Error sending the request or receiving the reply.
Examples	See example parameter1.
Related items	OpalSetParameters, OpalSetParametersByName

OpalGetParametersByName

Group	Model Interaction, Parameters
Description	Returns the parameters’ information for the specified list. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetParametersByName (unsigned int allocatedParams,char paramPathName[], OP_PARAMETER_INFO *parameterInfo);
Input	allocatedParam: number of parameters to get information from paramPathName: list of parameters’ path and name to get information from. Size of the list is allocatedParams
Output	parameterInfo: List of parameters’ structures returned. Size of the list isallocatedParam. See OP_PARAMETER_INFO
Return value	EOK: Success. ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel.
Examples	Parameter1
Related items	OpalSetParametersByName, OP_PARAMETER_INFO

OpalGetParametersDescription

Group	Model Interaction, Parameters
Description	Returns the set of information of parameters and variables for the current model. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetParametersDescription (unsigned int numParams,OP_PARAMETER_INFO parameterInfo, unsigned int numVars, OP_VARIABLE_INFO **variableInfo);
Input	None
Output	numParamss: number of model’s parameters. parameterInfo: List of parameters’ structures returned. Size of the list isnumParams. See OP_PARAMETER_INFO numVars: number of model’s variables. variableInfo: List of variables’ structures returned. Size of the list isnumVars. See OP_VARIABLE_INFO THIS STRUCTURE IS ALWAYS NULL IN THIS VERSION OF THE API.
Return value	EOK: Success. ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel.
Examples	Parameter1
Related items	OP_PARAMETER_INFO, OP_VARIABLE_INFO

OpalGetPauseTime

Group	Model Execution
Description	Gets the value of the pause time.
Required Control	None
Usage	int OpalGetPauseTime(double *time);
Input	None
Output	time: Pause time in seconds.
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalSetPauseTime

OpalGetPhysNodeList

Group	Model Preparation
Description	Returns the list of physical nodes in the current hardware configuration. The physical node names are as defined in the hardware.config file. If the allocated storage is too small for the number of physical nodes, or for the longest physical node name, none of the names are returned, but the numPhysNodes and maxPhysNodeNameLen values are set, and the return value is E2BIG. An application can use this fact to specify lengths of 0 on a first call, allocate the required storage and issue a second call to get the information.
Required Control	None
Usage	int OpalGetPhysNodeList(unsigned short allocatedPhysNode,unsigned short numPhysNodes,unsigned short allocatedPhysNodeNameLen, unsigned short maxPhysNodeNameLen, char *physicalNodeName[]);
Input	allocatedPhysNode: number of physical nodes for which storage wasallocated by the caller for the names and logical Ids. allocatedPhysNodeNameLen: allocated length of the storage buffer to receive thephysical node names.
Output	numPhysNodes: Number of physical nodes. maxPhysNodeNameLen: Length of the longest physical node name. physicalNodeName: Array of strings where the API stores the names of the physical nodes.
Return value	EOK: Success. E2BIG: Specified storage not big enough to receive values. EBADF:Model not specified by previous OpalConnect or OpalSetCurrentModel. OP_API_EBAD_CONFIG: Hardware configuration file doesn't exist or no nodes are specified. EIO: Error sending the request or receiving the reply.
Examples	See example configuration.
Related items	None

OpalGetRtlabVersion

Group	Utilities
Description	Returns the versions of the RT-LAB API and the currently running MetaController
Required Control	None
Usage	int OpalRtlabVersion(char metaVersion,unsigned short metaVersionLen, char apiVersionunsigned short apiVersionLen);
Input	metaVersionLen: Size of the buffer for the MetaController version. apiVersionLen: Size of the buffer for the API version.
Output	metaVersion: Pointer to a buffer where the MetaController version is stored. Buffer must have been allocated before calling the function metaVersionLen: Pointer to where the API stores the length of the MetaController version string. The value is only updated if the MetaController version string’s length is bigger than the allocated one. apiVersion: Pointer to a buffer where the API version is stored. Buffer must has been allocated before calling the function. apiVersionLen: Pointer to where the API stores the length of the API version string. The value is only updated if the API version string’s length is bigger than the allocated one.
Return value	EOK: Succes E2BIG: Allocated buffers are too small. EIO: Error connecting to MetaController
Examples	None
Related items	None

OpalGetRtlabLicenseExpirationDate

Group	Model selection
Description	Returns the number of days remaining before the RT-Lab license expires. (deprecated) Always return -1.
Required Control	None
Usage	int OpalGetRtlabLicenseExpirationDate(int *nbDaysLeft);
Input	None
Output	nbDaysLeft: Number of days before the license expires. (deprecated) Always return -1.
Return value	EOK: success OP_API_ENO_LICENSE: license not available
Examples	None
Related items	None

OpalGetSignalControl

Group	Model Interaction, Control Signals
Description	Requests or releases the signal control of the currently connected model. Signal control allows the client API to change the values of models's control signals. Only one client API at a time is granted signal control.
Required Control	None
Usage	int OpalGetSignalControl(unsigned short logicalId,unsigned short signalControl);
Input	logicalId: Always 0. signalControl: True(1) to request control of the signals of the model or thenode, False(0) to release control of all target subsystems.
Output	None
Return value	EOK: Success. EPERM: Control requested, but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	See example control_signal.
Related items	OpalSetControlSignals

OpalGetSignalsByName

Group	Model Interaction, Signals
Description	Returns the values for the specified signal names
Required Control	None
Usage	int OpalGetSignalsByName(int signalCnt,char *ppSignalNameList, double pRetValueList);
Input	signalCnt: Number of signals to get. ppSignalNameList: List of signals' names to get the values.
Output	pRetValueList: List of value associated to the specified signals’ names
Return value	EOK: Success. EPERM: Control requested, but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: Invalid parameters
Examples	None
Related items	OpalGetSignalsDescription

OpalGetSignalsDescription

Group	Model Interaction, Control Signals
Description	Returns a set of basic information for each available signal in the model. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory.
Required Control	None
Usage	int OpalGetSignalsDescription(int pSignalCnt,OP_SIGNAL_INFO *ppSignalInfoList);
Input	None
Output	pSignalCnt: Number of signals returned. ppSignalInfoList: List of signals' description returned. See OP_SIGNAL_INFO.
Return value	EOK: Success. EPERM: Control requested, but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: Invalid parameters
Examples	None
Related items	OpalGetSignalsByName

OpalGetStopTime

Group	Model Execution
Description	Gets the value of the stop time.
Required Control	None
Usage	int OpalGetStopTime(double *time);
Input	None
Output	time: Stop time in seconds.
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalSetStopTime

OpalGetSubsystemList

Group	Model Preparation
Description	Returns the list of subsystems in the current model: their name, their logical id and the name of the physical node on which each is assigned. The physical node name is an empty string when the subsystem has not yet been assigned to a physical node. If the allocated storage is too small for the number of subsystems, or for the longest subsystem or physical node name, none of the names or logical ids are returned, but the numSubsys, maxSubsysNameLen and maxPhysNodeNameLen values are returned to the user. An application can use this fact to specify lengths of 0 on a first call, allocate the required storage and issue a second call to get the information.
Required Control	None
Usage	int OpalGetSubsystemList(unsigned short allocatedSubsys,unsigned short numSubsys,unsigned short allocatedSubsysNameLen, unsigned short maxSubsysNameLen, unsigned short allocatedPhysNodeNameLen, unsigned short maxPhysNodeNameLen, char subsysName[],unsigned short logicalId[], char *physNodeName[]);
Input	allocatedSubsys: number of subsystems for which storage was allocatedby the caller for the names and logical Ids. allocatedSubsysNameLen: allocated length of the storage buffer to receive the subsystem names. allocatedPhysNodeNameLen: allocated length of the storage buffer to receive thephysical node names.
Output	numSubsys: Number of subsystems. maxSubsysNameLen: Length of the longest subsystem name. maxPhysNodeNameLen: Length of the longest physical node name. subsysName: Array of strings where the API stores the names of the subsystems. logicalId: See Glossary. physicalNodeName: Array of strings where the API will store the names ofthe physical nodes associated to each subsystem.
Return value	EOK: Success. E2BIG: Specified storage not big enough to receive values. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. ESRCH: Model has not been compiled yet. EIO: Error sending the request or receiving the reply.
Examples	See example configuration.
Related items	None

OpalGetSystemControl

Group	Model Configuration, System
Description	Requests or releases the system control of the currently connected model. System control enables the client API to control the model's execution. Only one client API at a time is granted system control.
Required Control	None
Usage	int OpalGetSystemControl(unsigned short systemControl);
Input	systemControl: True(1) to request system control of the model, False(0) torelease its control.
Output	None
Return value	EOK: Success. EPERM: Control requested but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. ESRCH: Model instance id not found.
Examples	See example basic_example1.
Related items	OpalConnect, OpalConnectByName, OpalSetCurrentModel

OpalGetTargetFile

Group	Utilities
Description	Transfers files from the target node to the host development node using the FTP protocol. The FTP user used for the transfer is defined in the RT-LAB hardware configuration which can be modified through the RT-LAB MainControl sub-panels.
Required Control	None
Usage	int OpalGetTargetFile (char sourceNodeName,char sourceFile, char *targetPath, OP_FILE_TRANSFER_MODE mode, unsigned short logicalId);
Input	sourceNodeName: Physical node name (defined in RT-LAB hardware configuration). sourceFile: Path and name of the file to be transferred (accepts wildcards). targetPath: Path (only) of the target directory. mode: See OP_FILE_TRANSFER_MODE. logicalId: See Glossary. To specify all subsystem, set the logicalId to 0.
Output	None
Return value	EOK: Success. EFAULT: Invalid parameter. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EINVAL: Invalid subsystem id. EIO: Error sending the request or receiving the reply.
Examples	See example file_transfer.
Related items	OP_FILE_TRANSFER_MODE, OpalPutTargetFile

OpalGetTargetNodeSystemInfo

Group	Utilities
Description	Returns information about a specified target.
Required Control	None
Usage	int OpalGetTargetNodeSystemInfo (const char * const targetname, OP_NODE_SYSTEM_INFORMATION * pNodeInfo);
Input	targetName: RT-LAB target name. pNodeInfo: Information on target. See OP_NODE_SYSTEM_INFORMATION
Output	None
Return value	EOK: Success. EINVAL: Invalid target name EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OP_NODE_SYSTEM_INFORMATION

OpalGetTargetPlatform

Group	Model Preparation
Description	Returns the target platform for the local or global settings.
Required Control	None
Usage	int OpalGetTargetPlatform(unsigned short *targetPlatform,unsigned short scope_flag);
Input	scope_flag See OP_SETTING_FILE. Valid values are: 0: local settings 1: global settings
Output	targetPlatform: Pointer to where the API stores the current target platform (enum OP_TARGET_PLATFORM).
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EINVAL: Target platform not found. ENOENT: Problem with the configuration file. EPERM: Configuration Control not granted. ENOMEM: Not enough memory.OP_API_UPDATE_ AVAILABLE An update is available for this target platform.
Examples	None
Related items	OpalSetTargetPlatform, OP_TARGET_PLATFORM, OP_SETTING_FILE

OpalGetTimeInfo

Group	Model Configuration, System
Description	Returns the value of the calculation step specified in the current model, and the time factor to apply to obtain the effective calculation step.
Required Control	None
Usage	int OpalGetTimeInfo(double calcStep,double timeFactor);
Input	None
Output	calcStep: Pointer to where the API stores the calculation step size as specified in the model file. timeFactor: Pointer to where the API stores the time factor, which is multiplied by the calculation step size to obtain the effective calculation step size.
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalSetTimeFactor

OpalGetValueByAlias

Group	Model Interaction, Alias
Description	Gets the values of one or more parameters (or signals) by specifying their alias names. The output contains one value for each alias.
Required Control	None
Usage	int OpalGetValueByAlias(int allocatedAlias,const char ** aliasNames, double * aliasValues);
Input	allocatedAlias: Number of aliases to get. aliasNames: List of aliases’ names to get.
Output	aliasValues: List of values for the parameters or signals referenced by thealiases.
Return value	EOK: Success. EINVAL: At least one of the alias doesn’t exist. ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. OP_API_MODEL_IO_T TIMEOUT: Timed out waiting for reply from model. OP_API_MODEL_IO_E RROR: Model is missing some or all processes or subsystems.
Examples	None

OpalInstallRtlab

Related items
Group	Utilities
Description	Installs the current version of RT-LAB on the specified target. A log file is created during this installation or the filename is returned by the function. To install a different version of RT-LAB, use OpalInstallTarget() instead.
Required Control	None
Usage	int OpalInstallTarget(const char * nodeName);
Input	nodeName: RT-LAB target node name.
Output	logFilename: Path and file name of the log file if any.
Return value	EOK: Success. ESRCH: RT-LAB target file not found. EFAULT: No nodeName or filename have been specified. OP_API_EBAD_PHYS_ NODE: Invalid node name.
Examples	None

OpalInstallTarget

Group	Utilities
Description	Installs an archive file (TGZ or RPM) on the specified target. A log file is created during this installation or the filename is returned by the function. To install the current version of RT-LAB, use OpalInstallRtlab() instead.
Required Control	None
Usage	int OpalInstallTarget(const char * nodeName,const char * filename, char ** logFilename);
Input	nodeName: RT-LAB target node name. filename: Path and file name of the target to install.
Output	logFilename: Path and file name of the log file if any.
Return value	EOK: Success. ESRCH: RT-LAB target file not found. EFAULT: No nodeName or filename have been specified. EINVAL: Unknown file extension for the RT-LAB target file. OP_API_EBAD_PHYS_ NODE: Invalid node name.
Examples	None
Related items

OpalIsOriginalModelOpen

Group	Model Interaction, Original Model
Description	Returns true if the original Simulink model (block diagram) of the currently connected model is open on the local machine. Please note that this function is only available on Windows and Linux operating system when the model is a Simulink model.
Required Control	None
Usage	int OpalIsOriginalModelOpen();
Input	None
Output	None
Return value	true: original model is open
Examples	None
Related items	OpalLoadOriginalModel

OpalLoad

Group	Model Execution
Description	Load the model's executables in memory. Upon successful return, all subsystems are loaded and waiting for the Execute command. The subsystems are loaded on the nodes associated to them in the last call to OpalSetNodeMapping.
Required Control	System control
Usage	int OpalLoad(unsigned short realTimeMode,OP_API_INSTANCE_ID *instanceId, double timeFactor);
Input	realTimeMode: See OP_REALTIME_MODE. timeFactor: See Glossary.
Output	instanceId: See Glossary.
Return value	EOK: Success. ENOENT: No such file or directory. EPERM: System control requested, but already given to another client. EBUSY: Node busy (another subsystem already loaded on it). EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. E2BIG: More than 1 acquisition group found for simulation without data. EINVAL: Invalid Time Factor value or invalid model path. EACCES: Trying to load a Dinamo model with more than one subsystem (currently not supported). EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. ESRCH: Model instance id not found. OP_API_EBAD_PHYS_NODE: A subsystem is not assigned to a physical node or is assigned to an invalid physical node. OP_API_EBAD_CONFIG: Error reading configuration file or invalid setting found in configuration file. OP_API_EBAD_DEV_ENV: Could not get the target development node. OP_API_MODEL_IO_ TIMEOUT: Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems. OP_API_ENO_NODE_ LICENSE: Not enough licenses (number of model's subsys is greater than the number of available node licenses). OP_API_ENO_TARGET_ LICENSE OP_API_ENO_RTCOMM_LICENSE: No license for the selected target. OP_API_ENO_TARGET_MULT_LICENSE: No license for selected real-time communication. OP_API_ENO_DINAMO_ LICENSE: No license for multiprocessing. OP_API_ENO_POLLING_LICENSE: No license for dinamo. No license for XHP mode. OP_API_ERR_LOAD_ EMBEDDEDOP_API_ERR_LOAD_CALC_ STEP: Model's instance Id is reserved for embedded mode. Calculation step is invalid (usually <= 0). OP_API_EBAD_SIGNAL: At least one signal (id or element) is not found. OP_API_ENO_DYN_SIGNAL:Trying to set dynamic signals for an acquisition group that is not set to accept some. OP_API_INVALID_COMPILED_VERSION: The model has been compiled with another RT-LAB version. It has to be recompiled.
Examples	See example basic_example2.
Related items	OpalReset, OpalGetModelState, OpalGetSystemControl, OP_REALTIME_MODE.

OpalLoadAliasDescription

Group	Model Interaction, Alias
Description	Load a list of aliases in the current list of aliases. The new list can replace the current list of aliases or it can be merged with the current list depending on the function's settings. Specifying a pattern ensures that only matching aliases are loaded. Wildcard characters (?,*) may by used in pattern.
Required Control	System control
Usage	int OpalLoadAlias(const char * fileName,const char * aliasNamePattern, OP_LOAD_FILE_OPTION options, OP_LOAD_FILE_STATUS * status);
Input	fileName: Absolute or relative path of the file to load. aliasNamePattern: See Glossary. options: Options that tells the function how to handle conflicts. See OP_LOAD_FILE_OPTION.
Output	status: Status of the operation. See OP_LOAD_FILE_STATUS.
Return value	EOK: Success. ENOENT: Cannot open alias file. EPERM: Configuration control has not been granted to this client. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel.
Examples	None
Related items	OpalCreateAlias, OpalRemoveAlias, OpalSaveAlias, OpalLoadAliasDescription, OP_LOAD_FILE_STATUS, OP_LOAD_FILE_OPTION.

OpalLoadAlias

Group	Model Interaction, Alias
Description	Load a list of aliases. The new list isn’t merged to the current list of aliases or doesn’t replace the current list of aliases. Specifying a pattern ensures that only matching aliases information is returned. Wildcard characters (?,*) may be used in the pattern. Memory for output structure has been allocated by the RT-LAB API. User must free this memory with a call to OpalFreeMemory. The existing field of the aliasInfo structure indicates if the loaded alias matches an alias in the current list of alias. When a match exists, the newAlias field of the aliasInfo structure contains a pointer of the matched alias.
Required Control	None
Usage	int OpalLoadAliasDescription(const char * fileName,const char * aliasNamePattern, int * numberAlias OP_ALIAS_INFO ** aliasInfo);
Input	fileName: Absolute or relative path of the file to load. aliasNamePattern: See Glossary.
Output	numberAlias: The number of aliases returned in the structure. aliasInfo: List of aliases' structure returned.
Return value	EOK: Success. ENOENT: Cannot open parameter file. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel.
Examples	None
Related items	OpalCreateAlias, OpalLoadAlias, OpalSaveAlias, OpalGetAliasDescription, OP_ALIAS_INFO.

OpalLoadConsole

Group	Model Interaction, Console
Description	Loads on the client machine the console subsystem associated with the current connected model. Upon successful return, the console is opened. Only Simulink consoles are supported. Please note that this function is only available on Windows and Linux operating system when the model contains a console subsystem. Furthermore, the client machine must have Matlab installed.
Required Control
Usage	int OpalLoadConsole();
Input	None
Output	None
Return value	EOK: success EBADF: model not specified by previous OpalConnect or OpalSetCurrentMode EINVAL: not a Simulink model EIO: error sending the request or receiving the reply ENOENT: the model path and/or name is NULL EACCES: cannot access the modelname.subsys file (this file is generated during the model’s compilation) OP_API_SEPARATION: the model doesn’t contain a Simulink console subsytemor the format of the .subsys file is incorrect (this file is generated during the model’s compilation) EDOM:* model version is different from Simulink version. ERANGE: model version is not compatible with MATLAB version
Examples
Related items	OpalExecuteConsole, OpalPauseConsole, OpalResetConsole, OpalStopConsole

OpalLoadOriginalModel

Group	Model Interaction, Original Model
Description	Loads the original model (block diagram) of the current connected model on the client machine. Furthermore, if the model is a Simulink model, the client machine must have Matlab installed.
Required Control
Usage	int OpalLoadOriginalModel();
Input	None
Output	None
Return value	EOK: success EBADF: model not specified by previous OpalConnect or OpalSetCurrentMode EINVAL: not a Simulink model EIO: error sending the request or receiving the reply ENOENT: the model path and/or name is NULL EDOM: model version is different from Simulink version. ERANGE: model version is not compatible with MATLAB version
Examples	None
Related items	OpalIsOriginalModelOpen, OpalResetOriginalModel

OpalLoadParameters

Group	Model Interaction, Parameters
Description	Load the parameters’ values from a file and applies them to the model.
Required Control	Parameter Control
Usage	int OpalLoadParameters(char pathName,OP_LOAD_PARAMS_OPTION option, OP_LOAD_PARAMS_STATUS pStatus);
Input	pathName: path + name of the file to load. option: see OP_LOAD_FILE_OPTION
Output	pStatus: see OP_LOAD_FILE_STATUS
Return value	EOK: Success. ENOENT: No such file or directory. EBADF:model not specified by previous OpalConnect or OpalSetCurrentMode EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error.
Examples	None
Related items	OpalSaveParameters

OpalLoadParametersDescription

Group	Model Interaction, Parameters
Description	Load and return the parameters from the specified file. Parameter's values are not set in the model memory. OpalSetParameters must be called with the return parameters to send new values to the model on target. ParameterInfo's member “exist” may have 4 values: OP_SEARCH_NOT_FOUND: parameter does not exist anymore. OP_SEARCH_FOUND_EXACT: parameter exists and have the same id. OP_SEARCH_FOUND_DIFFERENT: parameter exists and have a different id. OP_SEARCH_FOUND_ESTIMATION: parameter does not exist but a possible match is proposed. When exist > OP_SEARCH_NOT_FOUND, parameterInfo's member newParam is not NULL. Memory for output structures has been allocated by the RT-LAB API. You must free this memory with a call to OpalFreeMemory. For example, OpalFreeMemory(variableInfo); Please note that this all is only available when using a SIMULINK model.
Required Control
Usage	int OpalLoadParametersDescription(char pathName, unsigned int numParams,unsigned int numVars, OP_PARAMETER_INFO* parameterInfo, OP_VARIABLE_INFO variableInfo);
Input	pathName: path + name of the file to load without extension
Output	numParams: Number of parameters in the parameter file. numVars: Number of variables in the parameter file. parameterInfo: List of OP_PARAMETER_INFO structures. List size is equal to numParams. variableInfo: List of OP_VARIABLE_INFO structures. List size is equal to numVars. May be NULL if there are no variables.
Return value	EOK: Success. ENOENT: No such file or directory. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error.
Examples
Related items	OpalGetParametersDescription, OpalSaveParameters

OpalModelClean

Group	Model Preparation
Description	Clean model directory on targets. All intermediate files and folder are removed.
Required Control	System Control
Usage	int OpalModelClean (unsigned int option);
Input	option: Parameters to use when cleaning the model directory. See OP_MODEL_CLEAN_DEFINE for more information.
Output
Return value	EOK: Command successfully issued (See Description for more information). EPERM: System control was not granted to this client. EBUSY: Model executables already loaded. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: This operation is not supported on the specified target platform.
Examples
Related items	OP_MODEL_CLEAN_DEFINE.

OpalNewConnHandle

Group	Model selection
Description	Returns an opaque handle associated with a new connection, which becomes the current connection. The new connection is uninitialized, and its state is the same as for a new process or thread. This handle can be passed back to a subsequent OpalSetConnHandle. This call is only required when a thread must handle multiple connections. There is no need to call this function when a thread handles only one connection. There is no harm in doing so, as long as it is the first call made to RT-LAB API done by that thread. Changing this connection (e.g. by calling OpalConnect or OpalSetCurrentModel2) does not change the other connections, whereas one of those calls without first calling OpalNewConnHandle implicitly disconnects a previously existing connection.
Required Control
Usage	int OpalNewConnHandle(unsigned long *pHandle);
Input
Output	pHandle: handle of the new connection
Return value	EOK: success ENOMEM: memory allocation error E2BIG: too many open connections for this process
Examples	See multi_models
Related items	OpalGetConnHandle, OpalSetConnHandle, OpalDeleteConnHandle

OpalNotificationGetPathName

Group	Utilities
Description	Returns the path and name of the parameter(s) or signal(s) that have been modified when an event OP_PARAMETER_UPDATE or OP_SIGNAL_CHANGE is notified. This function should be called from within the callback function registered for the events listed above. It allows more information about the notification to be gathered upon the reception of such events. This function allocates the memory for the pathNameList pointer. User should call OpalFreeMemory to desallocate this pointer when the variable is no longer in use.
Required Control
Usage	int OpalNotificationGetPathName(OP_NOTIFICATION returnedNotification, int numberOfElements,char *pathNameList[]);
Input	returnedNotification: Notification structure that was previously returned withthe OP_PARAMATER_UPDATE or OP_SIGNAL_CHANGEevent.
Output	numberOfElements: Number of parameter(s) or signal(s) that have beenmodified. pathNameList: List of the element path and name. If this parameter is NULL, the function only returns the number of elements.
Return value	EOK: Success. EINVAL: Invalid notification structure. ENOMEM: Unable to allocate memory for the returned pointer. EIO: Invalid or incomplete data received from the model.
Examples	See the API parameter1 or signal1 examples.
Related items	OP_EVENTS, OP_NOTIFICATION, OpalNotificationGetID, OpalNotificationGetValue, OpalSetNotificationCallback

OpalNotificationGetID

Group	Utilities
Description	Returns the IDs of the parameter(s) or signal(s) that have been modified when an event OP_PARAMETER_UPDATE or OP_SIGNAL_CHANGE is notified. This function should be called from within the callback function registered for the events listed above. It allows more information about the notification to be gathered upon the reception of such events. This function allocates the memory for the idList pointer. User should call OpalFreeMemory to desallocate this pointer when the variable is no longer in use.
Required Control
Usage	int OpalNotificationGetId(OP_NOTIFICATION returnedNotification,int numberOfElements, unsigned int *idList);
Input	returnedNotification: Notification structure that was previously returned withthe OP_PARAMATER_UPDATE or OP_SIGNAL_CHANGEevent.
Output	numberOfElements: Number of parameter(s) or signal(s) that have been modified. idList: List of the elements IDs. If this parameter is NULL, the function only returns the number of elements.
Return value	EOK: Success. EINVAL: Invalid notification structure. ENOMEM: Unable to allocate memory for the returned pointer. EIO: Invalid or incomplete data received from the model.
Examples	See the API parameter1 or signal1 examples.
Related items	OP_EVENTS, OP_NOTIFICATION, OpalNotificationGetValue, OpalNotificationGetPathName, OpalSetNotificationCallback

OpalNotificationGetValue

Group	Utilities
Description	Returns the values of the parameter(s) or signal(s) that have been modified when an event OP_PARAMETER_UPDATE or OP_SIGNAL_CHANGE is notified. This function should be called from within the callback function registered for the events listed above. It allows more information about the notification to be gathered upon the reception of such events. This function allocates the memory for the valueList pointer. User should call OpalFreeMemory to desallocate this pointer when the variable is no longer in use.
Required Control
Usage	int OpalNotificationGetValue(OP_NOTIFICATION returnedNotification,int numberOfElements, int *valueList);
Input	returnedNotification: Notification structure that was previously returned withthe OP_PARAMATER_UPDATE or OP_SIGNAL_CHANGEevent.
Output	numberOfElements: Number of parameter(s) or signal(s) that was modified. valueList: List of the element IDs. If this parameter is NULL, the function only returns the number of elements.
Return value	EOK: Success. EINVAL: Invalid notification structure. ENOMEM: Unable to allocate memory for the returned pointer. EIO: Invalid or incomplete data received from the model.
Examples	See the API parameter1 or signal1 examples.
Related items	OP_EVENTS, OP_NOTIFICATION, OpalNotificationGetID, OpalNotificationGetPathName, OpalSetNotificationCallback

OpalOpenProject

Group	Model and project selection
Description	Connects the API to an active project and contained models. Subsequent API calls refer to this project and models.
Required Control	None
Usage	int OpalOpenProject(const char * projectPath, unsigned short returnOnAmbiguity, OP_API_INSTANCE_ID* instId);
Input	projectPath: the name of the .llp file that refers to the project. A full relative or absolute path is preferred, but the file name alone will work provided the executable from which this call is made is in a subdirectory of the project. instId: The id of the model instance to which the connection is to be made. Should be set to 0 if projectPath is specified. returnOnAmbiguity: If set to non-zero, a pop-up will come up if the projectPath is ambiguous, otherwise and error is returned without a pop-up.
Output	None
Return value	EOK: Success. EIO: Error sending the request or receiving the reply. ESRCH: Invalid instance id or instance id not found. EPERM: Control requested, but already given to another client. ENOEXEC: Could not connect to model. Not all of the subsystems are still active. EINVAL: Trying to connect to a model whose local and UNC path are both empty. ENOENT: Could not find the original model we are trying to connect to. OP_API_EBAD_CONFIG: Node mapping not valid or IP address of controller machine not specified (environment variable OPAL_META_CTL_IP not set). OP_API_EBAD_PHYS_NODE: Physical node not found. OP_API_EMODEL_CHANGED: The original model has been changed (number of sub-systems, sub-systems names, etc. OP_API_ENO_LICENSE: No license. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx. OP_API_MODEL_IO_ TIMEOUT OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	See example basic_example1, 2, blob1.c, acquisition1.c
Related items	OpalConnectByName (deprecated), OpalDisconnect (deprecated), OpalCloseProject

OpalPause

Group	Model Execution
Description	Pause the execution of the currently connected model.
Required Control	System Control
Usage	int OpalPause(void);
Input
Output
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: Model not loaded. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. OP_API_MODEL_IO_TIMEO UT: Timed out waiting for reply from model. Examples OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	See example basic_example2.
Related items	OpalExecute, OpalGetSystemControl, OpalReset

OpalPauseConsole

Group
Description	Pauses and stops execution of the Simulink console associated with of the current connected model. Before calling this function, the console must be executed. Please note that this function is only available on Windows and Linux operating system when the model contains a Simulink console subsystem. The client machine must have Matlab install.
Required Control
Usage	int OpalPauseConsole();
Input
Output
Return value	EOK: success EBADF: model not specified by previous OpalConnect or OpalSetCurrentMode EINVAL: not a Simulink model EIO: error sending the request or receiving the reply ENOENT: the model path and/or name is NULL EACCES: cannot access the modelname.subsys file (this file is generated during the model’s compilation) OP_API_SEPARATION: the model doesn’t contain a Simulink console subsytemor the format of the *.subsys file is incorrect (this file is generated during the model’s compilation).
Examples
Related items	OpalExecuteConsole, OpalLoadConsole, OpalResetConsole, OpalStopConsole

OpalPing

Group	Utilities
Description	Checks if the specified target is connected to the network. If the target is up, try to connect to the RT-LAB daemon (OpalD) running on the target. This daemon is required in order to compile and load a model on this target.
Required Control
Usage	int OpalPing(const char *target);
Input	target: target to be ping. It can be a RT-LAB physical node name or an IP adress.
Output
Return value	EOK: Success. ENOMEM: Not enough memory to cmplete the operation EFAULT: Could not reach the target or daemon EBADF: Model not specified by previous OpalConnect or OpalSetCurrentMode
Examples
Related items

OpalPutTargetFile

Group	Utilities
Description	Transfers files from the host development node to the target node using the FTP protocol. The FTP user used for the transfer is defined in the RT-LAB hardware configuration. The RT- LAB hardware configuration can be modified through RT-LAB's MainControl sub-panels.
Required Control
Usage	int OpalPutTargetFile( char targetNodeName,char sourceFile, char *targetPath, OP_FILE_TRANSFER_MODE mode, unsigned short logicalId);
Input	targetNodeName: Physical node name (as defined in RT-LAB hardwareconfiguration). sourceFile: Path and name of the file to be transferred (accepts wildcards). targetPath: Path of the target directory where the file must betransferred. mode: FTP file transfer mode (ascii or binary). See OP_FILE_TRANSFER_MODE. logicalId: See Glossary. To specify all subsystem, set the logicalId to 0.
Output
Return value	EOK: Success. EFAULT: Invalid parameter. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EINVAL: Invalid subsystem id. EIO: Error sending the request or receiving the reply.
Examples	See example file_transfer.
Related items	OP_FILE_TRANSFER_MODE, OpalGetTargetFile

OpalRearmAsyncAcq

Group	Model Configuration, Acquisition
Description	Rearm the Trigger for a given Acquisition Group
Required Control
Usage	int OpalRearmAsyncAcq(unsigned short acqGroup);
Input	acqGroup: Acquisition group (numbering starts at 0)
Output
Return value	EOK: Success EPERM: Acquisition control for specified group had not been granted to this client EINVAL: Invalid acquisition group EACCES: Error saving parameters to .probe file EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel EIO: Error sending the request or receiving the reply OP_API_MODEL_IO_TIMEOUT: Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems
Examples
Related items	OpalSetAsyncAcqOpts

OpalRegisterDisplay

Group	Utilities
Description	Registers to receive displayed messages during the compilation and/or execution phase of a model. Please note that you must use the function OpalDisplayInformation to receive messages.
Required Control
Usage	int OpalRegisterDisplay(OP_DISPLAY_REG_TYPE registerType);
Input	registerType: Display client register type. See OP_DISPLAY_REG_TYPE.
Output
Return value	EOK: Success. EINVAL: Bad or invalid model. ENOMEM: Not enough memory for this request. ECHILD: The client is not found in the controller list, not registered. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	See example compilation.
Related items	OpalDisplayInformation, OP_DISPLAY_REG_TYPE

OpalReleaseFunctionControl

Group	Utilities
Description	Releases the control of the specified function block. See OP_FUNCTIONAL_BLOCK for more information about the available function blocks.
Required Control
Usage	int OpalReleaseFunctionControl( OP_FUNCTIONAL_BLOC fb,unsigned short fbElem );
Input	fb: Functional block which control is to be requested. See OP_FUNCTIONAL_BLOCK. fbElem: Functional block element which control is to be requested. This input is used to specify the acquisition group when the functional block is OP_FB_ACQ_GROUP. Normally, this value is 0.
Output
Return value	EOK: Success. EPERM: Control requested but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. EINVAL: Invalid function block or priority. ESRCH: Model instance id not found.
Examples
Related items	OpalTakeFunctionControl, OP_FUNCTIONAL_BLOCK.

OpalRemoveAlias

Group	Model Interaction, Alias
Description	Remove aliases from the current list of aliases currently associated with the active model. Specifying a pattern ensures that only maching aliases are removed. Wildcard characters (?,*) may by used in pattern.
Required Control	System control
Usage	int OpalRemoveAlias(const char * aliasNamePattern);
Input	aliasNamePattern: See Glossary.
Output
Return value	EOK: Success. EPERM: Configuration control has not been granted to this client. EINVAL: Alias not found. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples
Related items	OpalCreateAlias, OpalLoadAlias, OpalSaveAlias.

OpalRemoveExtraFile

Group	Model Preparation
Description	This function removes a file to the list of files to be transferred or retrieved during one of the following steps: transfer of files during compilation from the host to the target. retrieval of files during compilation from the target to the host transfer of files from the host to the target before the model is loaded retrieval of files from the target to the host after the model is reset
Required Control	System Control
Usage	int OpalRemoveExtraFile (OP_EXTRA_FILE_TRANSFER_TIME transferTime, unsigned short logicalId,char * filePathName);
Input	transferTime: See OP_EXTRA_FILE_TRANSFER_TIME. logicalId: See Glossary. To specify all subsystem, set the logicalId to 0. filePathName: This parameter can be set to NULL to remove all extra files forthe specified transfer time and logical id.
Output	None
Return value	EOK: Success. EFAULT: Invalid parameter. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ESRCH: Specified subsystem id not found.
Examples	None
Related items	OP_EXTRA_FILE_TRANSFER_TIME, OpalAddExtraFile, OpalGetSystemControl

OpalRemoveFromSelection

Group	Utilities
Description	Given the object's reference ID, removes it from the selected items.
Required Control	None
Usage	int OpalRemoveFromSelection(P_REF_ID *refId);
Input	*refId: Pointer to the reference ID (type UINT_64_T).
Output	None
Return value	EOK: Success.
Examples	None
Related items	None

OpalRenameAlias

Group	Model Interaction, Alias
Description	Rename an alias.
Required Control	System control
Usage	int OpalRenameAlias(const char * aliasName,const char * newAliasName);
Input	aliasName: Name of the alias to be renamed. newAliasName: New name of the alias.
Output	None
Return value	EOK: Success. EPERM: Configuration control has not been granted to this client. EINVAL: Alias not found. EACCES: The new alias already exists. EBADF:Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalCreateAlias, OpalRemoveAlias.

OpalReset

Group	Model Execution
Description	Stops and resets the current simulation.
Required Control	System Control
Usage	int OpalReset(void);
Input	None
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EEXIST: RT-LAB detected that the model did not reset correctly. Clean-up of processes left running was performed OP_API_MODEL_IO_TIMEOUT: Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes orsubsystems.
Examples	See example basic_example2.
Related items	OpalLoad, OpalGetSystemControl

OpalResetConsole

Group	Model Interaction, Console
Description	Resets and unloads the the Simulink console subsystem associated with the current con- nected model. Before calling this function, the client must call OpalLoadConsole. Please note that this function is only available on Windows and Linux operating system when the model contains a Simulink console subsystem. The client machine must have Matlab install.
Required Control
Usage	int OpalResetConsole();
Input	None
Output	None
Return value	EOK: success EBADF: model not specified by previous OpalConnect or OpalSetCurrentMode EINVAL: not a Simulink model EIO: error sending the request or receiving the reply ENOENT: the model path and/or name is NULL EACCES: cannot access the modelname.subsys file (this file is generated during the model’s compilation) OP_API_SEPARATION: the model doesn’t contain a Simulink console subsytemor the format of the *.subsys file is incorrect (this file is generated during the model’s compilation).
Examples	None
Related items	OpalExecuteConsole, OpalLoadConsole, OpalPauseConsole, OpalStopConsole

OpalResetOriginalModel

Group	Model Interaction, Original Model
Description	Closes the original Simulink model (block diagram) of the currently connected model. Please note that this function is only available on Windows and Linux operating system when the model is a Simulink model.
Required Control	None
Usage	int OpalResetOriginalModel();
Input	None
Output	None
Return value	EOK: success EBADF: model not specified by previous OpalConnect or OpalSetCurrentMode EINVAL: not a Simulink model EIO: error sending the request or receiving the reply ENOENT: the model path and/or name is NULL
Examples	None
Related items	OpalLoadOriginalModel, OpalIsOriginalModelOpen

OpalRestoreAttributes

Group	Generic
Description	Restore the default values of some object attributes. See the OP_ATTRIBUTE enumeration for a complete list of available attributes.
Required Control	Depending on the attribute types and the object types. See OP_ATTRIBUTE for more information on the required controls.
Usage	int OpalRestoreAttributes (int numAttributes, OP_REF ids[], OP_ATTRIBUTE attributes []);
Input	numAttributes: The number of attributes to retrieve ids: The array of object ids on witch the RestoreAttributes function will act. The size of the array must be equal to the numAttributes argument. attributes: The array of attributes to set on the corresponding objects specified with the ids argument. The size of the array must be equal to the numAttributes argument.
Output	None
Return value	EOK: Success. EINVAL: Invalid arguments specified. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EPERM: Required control had not been granted to this client to change the attribute.
Examples	None
Related items	OpalGetAttributes, OpalSetAttributes, OpalGetDefaultAttributes, OP_ATTRIBUTE

OpalSaveAlias

Group	Model Interaction, Alias
Description	Save the current aliases list in the specified file. Specifying a pattern ensures that only maching aliases are saved. Wildcard characters may by used in pattern.
Required Control	None
Usage	int OpalSaveAlias(const char * fileName,const char * aliasNamePattern);
Input	fileName: Absolute or relative path of the file to save. aliasNamePattern: See Glossary.
Output	None
Return value	EOK: Success. ENOENT: Cannot open alias file. ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel.
Examples	None
Related items	OpalCreateAlias, OpalRemoveAlias, OpalLoadAlias

OpalSaveParameters

Group	Model Interaction, Parameters
Description	Saves the current parameters’ values to the specified file.
Required Control	None
Usage	int OpalSaveParameters(char path,char name);
Input	path: path of the file to save. name: name of the file to save without extension.
Output	None
Return value	EOK: Success. ENOENT: No such file or directory. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error.
Examples	None
Related items	OpalLoadParameters, OpalLoadParametersDescription

OpalSendBlob

Group	Utilities
Description	Generates a user event. It will be sent to other clients which have registered this event using either the OpalSetNotificationCallback or the OpalSetNotificationCallbackForModel function.
Required Control	None
Usage	int OpalSendNotification(OP_EVENTS event,char*message);
Input	event: event to be triggered. Must be a user event See OP_EVENTS. message: message part of the notification to be sent.
Output	None
Return value	EOK: Success. EINVAL: Invalid event E2BIG: Message too long
Examples	None
Related items	OP_EVENTS, OP_NOTIFICATION, OpalSetNotificationCallback, OpalSetNotificationCallbackForModel

OpalSendNotification

Group	Utilities
Description	Generates a user event. It will be sent to other clients which have registered this event using either the OpalSetNotificationCallback or the OpalSetNotificationCallbackForModel function.
Required Control	None
Usage	int OpalSendNotification(OP_EVENTS event,char*message);
Input	event: event to be triggered. Must be a user event See OP_EVENTS. message: message part of the notification to be sent.
Output	None
Return value	EOK: Success. EINVAL: Invalid event E2BIG: Message too long
Examples	None
Related items	OP_EVENTS, OP_NOTIFICATION, OpalSetNotificationCallback, OpalSetNotificationCallbackForModel

OpalSetAcqBlockLastVal

Group	Model Configuration, Acquisition
Description	Set the current settings for the blocking / non-blocking, and associated last value flag, for signal acquisition. This information is used by the API acquisition functions, which have the option not to wait for data, needed by some console's lack of multiple thread support. The ProbeControl panel sets these settings using this call. These settings apply to the current model. These settings only apply to the command station from which this call is made.
Required Control	None
Usage	int OpalSetAcqBlockLastVal(short blockOnGroupshort lastValues);
Input	blockOnGroup: Acquisition group for which the API functions will wait for data (specify n for group n).If 0, API function will wait for data for all groups.If -1, API functions will not wait for any group's data. lastValues: Boolean, 1 means API functions will output the last values received while a group's data is not available. If 0, the API function will output zeroes. This paramater is ignored when blockOnGroup is not egal to -1
Output	None
Return value	EOK: success ENOMEM: memory allocation error EBADF: model not specified by previous OpalConnect EACCES: error saving parameters to .probe file EINVAL: invalid acquisition group ESRCH: the specified acquisition group is not active EIO: error sending the request or receiving the reply from Controller
Examples	None
Related items	OpalGetAcqBlockLastVal

OpalSetAcqTrigger

Group	Model Configuration, Acquisition
Description	Sets the acquisition trigger dynamically during the simulation. Data will be acquired only when a specific signal is triggered. The option of starting data acquisition only once a specified threshold is reached allows users to obtain information about a specified time-slice of the simulation. If a block OpTrigger is present in the model when activating the dynamic acquisition, the triggering will be set to the value of parameters provided by OpalSetAcqTrigger. When the parameter “triggerEnabled” in the OpalSetAcqTrigger interface is set to zero, the block OpTrigger will regain the triggering control once again.
Required Control	Acquisition Control
Usage	int OpalSetAcqTrigger( unsigned short acqGroup,const char signalName, double level,const char trigSignalName, int offset,OP_TRIGGER_CONDITION condition, unsigned char triggerEnabled, unsigned short trigType);
Input	acqGroup: Acquisition group (numbering starts at 0). signalName: Name of the signal to be triggered. level: Specifies the value that must be reached by the trigger signal to trigger acquisition. trigSignalName: Specifies a triggering signal instead of a constant value. If“level” is specified then trigSignalName must be NULL. offset: Used to set the number of steps (cycles) to wait before starting the acquisition system. condition: Condition to be satisfied so that the acquisition system istriggered. See OP_TRIGGER_CONDITION. triggerEnabled: Indicates the status of the trigger: on or off. trigType: Indicates the trigger type : trigger by value or trigger by signalTRIG_BY_SIGNAL(0) / TRIG_BY_VALUE(1).
Output	None
Return value	EOK: Success. EACCES: error saving parameters to .probe file. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EINVAL: invalid acquisition group. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. EPERM: System control had not been granted to this client. OP_API_EBAD_SIGNAL: The given signal is invalid.
Examples	None
Related items	OpalGetAcqTrigger

OpalSetAcqWriteFile

Group	Model Configuration, Acquisition
Description	Sets the filename to be used when acquiring data for a group into a file. Also allows to enabled or disable WriteFile. The running console which was getting data from the specified acquisition group will stop receiving any data for this group. The data are writting to a file on the target. The change is persistent and is used in subsequent runs of the model. The change affects any application acquiring data from this group.
Required Control	Acquisition Control
Usage	int OpalSetAcqWriteFile(unsigned short acqGroup,const char fileName, const char varName unsigned char bEnabled);
Input	acqGroup: Acquisition group (numbering starts at 0) fileName: Name of the file to write. varName: Name of the variable written in the file. bEnabled: TRUE (1) to start the data logging, FALSE (0) to stop it.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: invalid acquisition group. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EFAULT: Invalid write file name or invalid variable name. EACCES: error saving parameters to .probe file. E2BIG: Filename or variable name too big. OP_API_MODEL_IO_TIMEO UT Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	None
Related items	None

OpalSetAttributes

Group	Generic
Description	Set the values of some object attributes. See the OP_ATTRIBUTE enumeration for a complete list of available attributes.
Required Control	Depending on the attribute types and the object types. See OP_ATTRIBUTE for more information on the required controls.
Usage	int OpalSetAttributes (int numAttributes, OP_REF ids[], OP_ATTRIBUTE attributes [], void * attributeValues []);
Input	numAttributes: The number of attributes to retrieve ids:The array of object ids on witch the SetAttributes function will act. The size of the array must be equal to the numAttributes argument. attributes: The array of attributes to set for the corresponding objectsspecified with the ids argument. The size of the array must be equal to the numAttributes argument. attributeValues: The pointer to the array of values. The type of each value mustcorrespond to the attribute of the same index in attributes. The size of the array must be equal to the numAttributes argument.
Output	None
Return value	EOK: Success. EINVAL: Invalid arguments specified. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EPERM: Required control had not been granted to this client to change the attribute.
Examples	None.
Related items	OpalGetAttributes, OpalGetDefaultAttributes, OpalRestoreAttributes, OP_ATTRIBUTE.

OpalSetClockPeriodInfo

Group	Utilities
Description	Upates the ClockPeriod related information associated with the current model. This function is only valid for QNX 6.x models (not supported anymore).
Required Control	System Control.
Usage	int OpalSetClockPeriodInfo (const OP_CLOCK_PERIOD_INFO * const pInfos);
Input	pInfos: The new ClockPeriod information that needs to be updated for the current model.
Output	None
Return value	EOK: Success. EINVAL: Invalid parameter value or the model is loaded. EPERM: Not a QNX 6.x model or the required control is not owned.
Examples	None
Related items	OP_CLOCK_PERIOD_INFO, OpalGetClockPeriodInfo

OpalSetConnHandle

Group	Model selection
Description	The specified handle must have been obtained from OpalGetConnHandle or OpalNewConnHandle. This specifies the connection to which subsequent RT-LAB API calls refer, until changed again by OpalSetConnHandle or OpalNewConnHandle. This lets a thread handle multiple connections, switching from one to the other without disconnecting.
Required Control	None
Usage	int OpalSetConnHandle(unsigned long handle);
Input	handle: handle of a connection
Output	None
Return value	EOK: success ENOMEM: memory allocation error E2BIG: too many open connections for this process
Examples	See multi_models
Related items	OpalNewConnHandle, OpalGetConnHandle, OpalDeleteConnHandle

OpalSetControlSignals

Group	Model Interaction, Control Signals
Description	Sets the current values of the control signals (see Glossary) sent to the computation node subsystem. These signals can be return by a call to OpalSetControlSignals. The values are sent to the appropriate position at the output of the OpComm block, found in the subsystem with the specified logicalId, which receives its inputs from the model's console subsystem. All the values must be provided to this function. In order to set only one signal, see OpalSetSignalsByName.
Required Control	Signal Control
Usage	int OpalSetControlSignals (unsigned short numSignals,unsigned short logicalId, double values[]);
Input	numSignals: Number of values to set. logicalId: See Glossary. values: Value of each signal.
Output	None
Return value	EOK: Success. ENOMEM: Memory allocation error. EINVAL: Invalid logicalId. EPERM: Signal control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSet CurrentModel. EIO: Error sending the request or receiving the reply. EACCES: No console found in the model. Unable to send signals to sub- systems. ESRCH: Model has not been compiled yet.
Examples	See example control_signal.
Related items	OpalGetSignalControl, OpalGetControlSignals

OpalSetCurrentModel

Group	Model Selection
Description	Creates a new connection inside the API to an RT-LAB model. Subsequent API calls refer to this model. If connected to a different model, that connection is broken, and a connection is made to a new instance of the Controller. If the API is already connected to a different model, that connection is closed and a new connection is created to the specified model.
Required Control	None
Usage	int OpalSetCurrentModel (const char modelPathNameExt,OP_API_INSTANCE_ID instanceId);
Input	modelPathNameExt: Absolute path, file name and extension of the model.
Output	instanceId: See Glossary. Can be NULL if the caller does not care about the instance Id.
Return value	EOK: Success. ENOENT: No such file or directory. EBADF: Bad file name or path (contains a space character or exceeds 31 characters). EINVAL: Model path and name not specified. EIO: Error sending the request or receiving the reply. EBUSY: New model requested while some clients are still connected. OP_API_EBAD_CONFIG: IP address of controller machine not specified(environment variable OPAL_META_CTL_IP not set) or error reading configuration file. OP_API_ENO_LICENSE: No license for one or more of RT-LAB components. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx.
Examples	See example basic_example2.
Related items	OpalDisconnect

OpalSetDecimationFactor

Group	Model Configuration, Acquisition
Description	Sets the decimation factor to use when getting data for the specified acquisition group. The change is persistent and is used in subsequent runs of the model.
Required Control	Acquisition Control
Usage	int OpalSetDecimationFactor(unsigned short acqGroup,unsigned short decimation Factor);
Input	acqGroup: Acquisition group (numbering starts at 0) decimationFactor: value of the decimation factor to set for the specified acquisition group.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: invalid acquisition group or specified decimation factor is out of range. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EFAULT: Warning: Time factor differ from 1.0 EACCES: error saving parameters to .probe file. OP_API_MODEL_IO_TIMEO UT: Timed out waiting for reply from model. Examples OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	None
Related items	OpalSetFillDecimation

OpalSetFillDecimation

Group	Model Configuration, Acquisition
Description	Enable or disable the option to insert values when the acquisition group’s decimation factor is greater than 1. The decimation factor lets you skip acquisition during some calculation steps. When this parameter is set to a number n, a sample will be acquired at every n-th calculation step. However, the RT-LAB API will repeat the values every n-th step. It is useful when the values are displayed in chart graphs. For instance, if the decimation factor is set to 3, values returned by the acquisition functions will be:value1[0], value1[0], value1[0], value1[1], value1[1], value1[1], value1[2]... Application using XY graphs should disable this option.
Required Control	None
Usage	int OpalSetFillDecimation(unsigned char bEnabled);
Input	None
Output	bEnable: if TRUE (default), values are inserted. if FALSE, values are not inserted.
Return value	EOK: success ENOMEM: memory allocation error
Examples	None
Related items	None

OpalSetNodeCpu

Group	Model Preparation
Description	Set the cpu assignment option for a list of subsystems of the current model. The new option becomes valid as soon as the next Load command is completed. Cpu assignment is not available for NT target.
Required Control	System Control
Usage	int OpalSetNodeCpu (unsigned short numSubsys,char subsysName[], char cpuOption);
Input	numSubsys: Number of subsystems for which the XHP option is specified. subsysName: Array of the subsystem names. cpuOptions: Cpu assignment for the associated subsystem. -1 meansautomatic mode.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOENT: Invalid subsystem name found in subsysName list parameter. EINVAL: Unable to change the cpu assignment because of the model state.
Examples	None
Related items	OpalGetNodeCpu

OpalSetMatlabRelease

Group	Utilities
Description	Sets the version of MATLAB to be used for edition and compilation.
Required Control	None
Usage	int OpalSetMatlabRelease(OP_MATLAB_VERSION release);
Input	release: MATLAB version. See OP_MATLAB_VERSION.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: Invalid version. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OP_MATLAB_VERSION

OpalSetNodeMapping

Group	Model Preparation
Description	Defines a mapping between a list of subsystems of the current model and a list of corresponding physical node names. The new mapping becomes valid as soon as the next Load command is completed.
Required Control	System Control
Usage	int OpalSetNodeMapping (unsigned short numSubsys,char subsysName[],char physicalNodeName[]);
Input	numSubsys: Number of subsystems for which the node mapping isspecified. subsysName: Array of the subsystem names. physicalNodeName: See Glossary.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOENT: Invalid subsystem name found in subsysName list parameter. EINVAL: Unable to change the node mapping because of the model state. OP_API_EBAD_PHYS_NODE: Physical node not found.
Examples	See example configuration.
Related items	OpalGetSystemControl

OpalSetNodeXHP

Group	Model Preparation
Description	Set the XHP mode option for a list of subsystems of the current model. The new option becomes valid as soon as the next Load command is completed.
Required Control	System Control
Usage	int OpalSetNodeXHP (unsigned short numSubsys,char subsysName[], char XHPOption);
Input	numSubsys: Number of subsystems for which the XHP option is specified. subsysName: Array of the subsystem names. XHPOptions: list of boolean values to set the XHP mode for the corresponding subystem. FALSE (0) means subsystem will not run in XHP mode. TRUE (1) means the subsystem will run in XHP mode.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOENT: Invalid subsystem name found in subsysName list parameter.
Examples	None
Related items	OpalGetNodeXHP

OpalSetNotificationCallback

Group	Utilities
Description	Registers a callback function that will be called when a specific event happens in the simulator. The callback function will be called when an event from the registered events list happens. To register events for a particular model, use OpalSetNotificationCallbackForModel. Note that if an event is registered for both project and model, only the model callback will be called. Each time this function is called, the event list and the callback function passed in argument will replace the previously registered list and callback function. Pass an empty event list to unregister all events. Use special event OP_ALL_EVENTS to register all possible events. You can also define your own events, see OP_EVENTS The callback function can be defined as following: void pfnCallback(OP_NOTIFICATION notification, void * pUserData) { /Some code.../ }
Required Control	None
Usage	int OpalSetNotificationCallback(unsigned short numEvents,OP_EVENTS eventsList[], OPALCALLBACK pfnCallback, void *pUserData);
Input	numEvents: number of the registered event in eventsList arguments eventsList: list of events (see OP_EVENTS) that will generate a call to the registered callback function. pfnCallback: callback function pUserData: second argument of the callback function
Output	None
Return value	EOK: Success. EINVAL: Invalid number of events or callback function is NULL or event list is NULL EBADF: invalid event found in events list
Examples	None
Related items	OP_EVENTS, OP_NOTIFICATION, OpalSetNotificationCallbackForModel, OpalNotificationGetPathName, OpalNotificationGetID, OpalNotificationGetValue

OpalSetNotificationCallbackForModel

Group	Utilities
Description	Registers a callback function that will be called when a specific event happens in the simulator. The callback function will be called when an event from the registered events list happens and is related to the specified model. To register events for all models in a project use OpalSetNotificationCallback, or set model ID to 0 (zero). If an event is registered for both model and project. Each time this function is called with the same model ID, the event list and the callback function passed in argument will replace the previously registered list and callback function. However, you can register a specific event list and callback function for each model. Pass an empty event list to unregister all events. Use special event OP_ALL_EVENTS to register all possible events. You can also define your own events, see OP_EVENTS. The callback function can be defined as following: void pfnCallback(OP_NOTIFICATION notification, void * pUserData) { /Some code.../ }
Required Control	None
Usage	int OpalSetNotificationCallbackForModel(unsigned short numEvents,OP_EVENTS eventsList[], OPALCALLBACK pfnCallback, void *pUserData, OP_REF_ID modelId);
Input	numEvents: number of the registered event in eventsList arguments eventsList: list of events (see OP_EVENTS) that will generate a call to the registered callback function pfnCallback: callback function pUserData: second argument of the callback function modelId: ID of the model whose events will be detected
Output	None
Return value	EOK: Success. EINVAL: Invalid number of events or callback function is NULL or event list is NULL or modelId is invalid. EBADF: invalid event found in events List
Examples	None
Related items	OP_EVENTS, OP_NOTIFICATION, OpalSetNotificationCallback, OpalNotificationGetPathName, OpalNotificationGetID, OpalNotificationGetValue

OpalSetNumberValues

Group	Model Configuration, Acquisition
Description	Sets number of values to be acquired for each signal of the specified acquisition group. This constitutes a unit of acquisition in which there are no breaks. Acquired data for this group is considered available when all numValues have been acquired. The change is persistent and is used in subsequent runs of the model. The change affects any application acquiring data from this group.
Required Control	Acquisition Control
Usage	int OpalSetNumberValues(unsigned short acqGroup,unsigned short numValues unsigned short valueType);
Input	acqGroup: Acquisition group (numbering starts at 0). numValues: number of values to be acquired for each signal of the specifiedacquisition group. valueType: always 0.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: invalid acquisition group or valueType not supported or the number of values is out of range. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EACCES: Error saving parameters to .probe file. OP_API_MODEL_IO_TIMEO UT: Timed out waiting for reply from model. Examples OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	None
Related items	None

OpalSetParameters

Group	Model Interaction, Parameters
Description	OpalSetParameters is obsolete. Replace it by OpalSetParameters2.

OpalSetParameters2

Group	Model Interaction, Parameters
Description	Change the value of one or more RT-LAB parameters in the model.
Required Control	Parameter Control
Usage	int OpalSetParameters2(unsigned int allocatedParams,unsigned int numParams, unsigned int idParam, unsigned int allocatedValues, unsigned int numValues, double values);
Input	allocatedParams: Number of parameters to change. idParams: List of parameter Id. allocatedValues: Number of values to change. values: List of new values of each parameter.
Output	numParams: Number of updated parameters. numValues: Number of updated values.
Return value	EOK: Success. EPERM: Parameter control had not been granted to this client. EBADF: Model not specified by previous Connect or SetCurrentModel. ENOEXEC: Model is not loaded. EINVAL: No parameter to set or invalid parameter id. E2BIG: Too many parameters or values to modify. ENOMEM: Memory allocation error. ENOENT: Cannot open parameter file or parameter id not found. EIO: Error sending the request or receiving the reply. OP_API_MODEL_IO_TIMEOUT: Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	See example parameter1.
Related items	OpalSetParametersByName, OpalLoadParametersDescription, OpalGetParametersDescription, OpalGetParameterControl

OpalSetParametersByName

Group	Model Interaction, Parameters
Description	Change the value of one or more RT-LAB parameters using their path and name in the model.
Required Control	Parameter control
Usage	int OpalSetParametersByName (unsigned int allocatedParams,char paramPathName[], unsigned int allocatedValues, double values);
Input	allocatedParam: number of parameters to set values paramPathName:list of parameters’ path and name to set values. Size ofthe list is allocatedParams allocatedValues: number of values to set. May be different of allocatedParam when vectors or matrix are set values: list of values to set. Size of the list is allocatedValues
Output	None
Return value	EOK: Success. EPERM: Parameter control had not been granted to this client. EBADF: Model not specified by previous Connect or SetCurrentModel. ENOEXEC: Model is not loaded. EINVAL: No parameter to set or invalid parameter id. E2BIG: Too many parameters or values to modify. ENOMEM: Memory allocation error. ENOENT: Cannot open parameter file or parameter name not found. EIO: Error sending the request or receiving the reply. OP_API_MODEL_IO_ TIMEOUT: Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	See the example Parameter1
Related items	OpalSetParameters, OpalGetParametersDescription, OpalGetParameterControl, OpalGetParametersByName

OpalSetPauseTime

Group	Model Execution
Description	Sets the value of the pause time. This value could be set whether the model is executed or not. If the model is executed and the pause time is set to a time that has been already reached, the model will pause immediately.
Required Control	System Control
Usage	int OpalSetPauseTime(double time);
Input	time: Pause time in seconds.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: Invalid time. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalGetPauseTime

OpalSetSignalsByName

Group	Model Interaction, Signals
Description	Sets the values for the specified signal names
Required Control	Signals
Usage	int OpalSetSignalsByName(int signalCnt,const char ** const ppSignalNameList, int valueCnt,const double * const pValueList);
Input	signalCnt: Number of signals to get. ppSignalNameList: List of signals' names to get the values. valueCnt: Number of values (should be equal to signalCnt) pValueList: List of values associated to the specified signals’ names
Output	None
Return value	EOK: Success. EPERM: Control requested, but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EINVAL: Invalid parameters
Examples	None
Related items	OpalGetControlSignalsDescription

OpalSetSimulationMode

Group	Model Preparation
Description	Sets the simulation mode. The specified simulation mode will be apply the next time the model is loaded. Simulation mode cannot be set when model is already loaded.
Required Control	System Control
Usage	int OpalSetSimulationMode(int simulationMode);
Input	simulationMode: See OP_REALTIME_MODE.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. ENOENT: Coud not write the simulation mode to the configuration file. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalGetModelState

OpalSetStopTime

Group	Model Execution
Description	Sets the value of the stop time. This value could be set whether the model is executed or not. If the model is executed and the stop time is set to a time that has been already reached, the model will stop immediately.
Required Control	System Control
Usage	int OpalSetStopTime(double time);
Input	time: Stop time in seconds.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: Invalid time. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply.
Examples	None
Related items	OpalGetStopTime

OpalSetTargetPlatform

Group	Model Preparation
Description	Sets the target platform where the model is to be compiled and executed.
Required Control	System control for local settings modifications Configuration control for global settings modifications
Usage	int OpalSetTargetPlatform (unsigned short targetPlatform,unsigned short scope_flag);
Input	targetPlatform: Value of target platform to save to configuration (See OP_TARGET_PLATFORM). scope_flag: 0: local settings (see Glossary). 1: global settings.
Output	None
Return value	EOK: Success. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. ENOENT: Could not write the key value to the file. ENOMEM: Not enough memory. OP_API_ENO_TARGET_LICENSE: No licence for selected target. OP_API_UPDATE_AVAILABLE: A new update is available for this selected target
Examples	See example configuration.
Related items	OpalGetConfigurationControl, OpalGetSystemControl, OpalGetTargetPlatform

OpalSetAsyncAcqOpts

Group	Model Configuration, Acquisition
Description	Sets the Repetitive Sampling Option and the Rearm Delay for a given acquisition group. Setting the Repetitive Sampling Option to True will automatically rearm the trigger after the rearmDelay period. Setting Repetitive Sampling Option to False will require a manual trigger rearm. This manual rearm can be performed using the OpalRearmAsyncAcq function call.
Required Control	Acquisition Control
Usage	int OpalSetAsyncAcqOpts(unsigned short acqGroup,unsigned char repetitive, double rearmDelay);
Input	acqGroup: Acquisition group (numbering starts at 0) repetitive: Repetitive (TRUE) or one shot (FALSE) rearmDelay: Delay in milliseconds This is the acquisition delay between the end of one frame and the beginning of the next. This parameter is used only for repetitive sampling.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: Invalid acquisition group. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EACCES: error saving parameters to .probe file. OP_API_MODEL_IO_TIMEO UT: Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems.
Examples	None
Related items	OpalRearmAsyncAcq

OpalSetTimeFactor

Group	Model Execution
Description	Sets the value of the time factor. When in real-time mode, the execution rate is the model's sampling rate times the time factor.
Required Control	System Control
Usage	int OpalSetTimeFactor(double timeFactor);
Input	timeFactor: See Glossary.
Output	None
Return value	EOK: Success. EPERM: System control had not been granted to this client. EINVAL: Invalid time factor. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. EFAULT: Warning: Time factor differ from 1.0
Examples	None
Related items	OpalExecute, OpalGetTimeInfo

OpalSetValueByAlias

Group	Model Interaction, Alias
Description	Sets the values of one or more parameters (or signals) by specifying their alias names and their values. Note that if any of the aliases specified in the argument referenced a parameter, the parameter control is required. If any of the aliases specified in the argument referenced a control signal, the signal control is required.
Required Control	Parameter control or/and signal Control
Usage	int OpalSetValueByAlias(int allocatedAlias,const char ** aliasNames, const double * aliasValues);
Input	allocatedAlias: Number of aliases to be setted. aliasNames: List of aliases names. aliasValues: List of values for the parameters or signals referenced by thealiases.
Output	None
Return value	EOK: Success. EPERM: Parameter or signal control has not been granted to this client. EINVAL: One of the aliases doesn’t exist. ENOMEM: Memory allocation error. EIO: Error sending the request or receiving the reply. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. OP_API_MODEL_IO_TIMEOUT OP_API_MODEL_IO_ERROR
Examples	None
Related items	OpalCreateAlias, OpalGetValueByAlias

OpalSingleStep

Group	Model Execution
Description	Execute one step of the currently connected model.
Required Control	System control.
Usage	int OpalSingleStep();
Input	None
Output	None
Return value	EOK: Success. ENOMEM: System control was not granted to this client. EPERM: Signal control was not granted to this client. EINVAL: System not loaded. EBADF: model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. OP_API_MODEL_IO_ TIMEOUT OP_API_MODEL_IO_ ERROR
Examples	None
Related items	OpalExecute, OpalPause

OpalSnapshot

Group	Model Interaction, Snapshot
Description	Takes or restores a snapshot of the model. A snapshot is an image of the model, at a specific time, this snapshot contains the following values for the model: states, parameters, inputs and outputs.
Required Control	Snapshot Control (or Monitoring Control)
Usage	int OpalSnapshot (OP_SNAPSHOT_CMD cmd,const char fileName, unsigned short overwrite, unsigned short increment, const char comment, unsigned short commentLen);
Input	cmd: see OP_SNAPSHOT_CMD fileName: Path on the target (optional) + name of file (without any extension) in which snapshot information is to be saved or to be read. This parameter is case-sensitive when the target runs on Linux. overwrite: True to overwrite the file if it already exists. If this parameter is set to false, a new snapshot file will be created each time a snapshot is taken. An incremental suffix (number) is added to filename. increment: Used only when restoring a snapshot. When taking a snapshot and if overwrite is set to false, a number is added at the end of the filename. This number is chosen automatically and is incremented with each new snapshot. When restoring a snapshot, increment is used to select file created with an automatic number. comment: User comments to add to the snapshot file. commentLen: Length in number of bytes of the comment string input parameter.
Output	None
Return value	EOK: Success. E2BIG: Filename length or comment length too big. EPERM: Snapshot control had not been granted to this client. EFAULT: Invalid snapshot file name. EINVAL: Trying to take snapshot when system is not loaded or trying to restore snapshot when system is not paused. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. OP_API_MODEL_IO_ TIMEOUT: Timed out waiting for reply from model. OP_API_MODEL_IO_ERROR: Model is missing some or all processes or subsystems. ENODEV: Snapshot has been disabled. EPERM: An error occurs when taking or restoring a snapshot. EBUSY: A snapshot command is already in progress. Try again later.
Examples	See example snapshot.
Related items	OpalGetMonitoringControl, OP_SNAPSHOT_CMD

OpalStartCompile2

Group	Model Preparation
Description	Starts the compilation steps, which separate the subsystems, generates the code and compiles each subsystem. This function enables you to specify: options by subsystem If numSubsys is equal to 0 and subsysName is equal to NULL, only the first option in the array will be read and this option will be applied to each subsystem. option in the array will be read and this option will be applied to each subsystem Compilation continues after this function has returned with a return code of EOK. You must call OpalDisplayInformation to get the compilation results and the compilation termination status. You may call OpalAbortCompile during the operation to stop the model's compilation. You must call OpalRegisterDisplay to register to receive status and compilation messages.
Required Control	System Control
Usage	int OpalStartCompile2 (unsigned short numSubsys,char* subsysName[] unsigned int option[]);
Input	numSubsys: number of subsystems for which the compilation options arespecified. Should be equal to the number of calculation subsystem (console subsystem is not included). subsysName: array of the subsystem names. option: array of compilation options for each subsystem. Indicates which step of the compilation is to be completed. See OP_COMPILATION_DEFINE.
Output	None
Return value	EOK: Command successfully issued (See Description for more information). OP_API_ESEPARATION: Error while separating the model's subsystems. OP_API_ECODE_GENERATION: Error while generating code for the subsystems. EPERM: System control was not granted to this client. EBUSY: Model executables already loaded. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. OP_API_ENO_PRODUCT: No license for RT-LAB and RT-LABx. OP_API_ENO_DEVELOP_LICENSE: No development license available. OP_API_ENO_TARGET_LICENSE: No license for selected target.
Examples	None
Related items	OpalAbortCompile, OpalDisplayInformation, OP_COMPILATION_DEFINE.

OpalStartExecutable

Group	Utilities
Description	Starts executable as an external process on the host computer. The function returns immediately and the outputs are available by calling the function OpalWaitExecutable. When the option OP_EXEC_FILE_OUTPUT_STDERR is set, the stderr outputs are separated of the stdout outputs. See OpalWaitExecutable for more information. When the option OP_EXEC_FILE_DETACHED is set, the outputs are lost.
Required Control	None
Usage	int OpalStartExecutable(const char * executable,const char * arguments, const unsigned int options, unsigned int * processId);
Input	executable: Path and file name of the executable. arguments: Arguments of the executable. options: Options to start executable. See OP_START_EXEC_DEFINE.
Output	processId: Process id of the executable.
Return value	EOK: Success. OP_EXEC_FILE_START_ALREADY OP_API_START_EXEC_FILE
Examples	None
Related items	OpalStopExecutable, OpalWaitExecutable, OP_START_EXEC_DEFINE.

OpalStartTargetPythonScript

Group	Utilities
Description	Starts a python script on the selected target. The script should be copied to the target before running the command. The script and log paths should be absolute (relative paths are not supported). The script output can be monitored using the OpalDisplay or by the OpalDisplayInformation() Api command. See the OpalDisplayInformation documentation for more details. The function EnableContinousScriptDisplay() can be called at the beginning of the Python script to enable continuous display during execution. If this command is not called, the script standard output will be displayed only at the end of the execution.
Required Control	The API should be connected to a model before running the command.
Usage	int OpalStartTargetPythonScript(const char * targeName,const char * targetAbsoluteScriptPath, const char * argsconst char * hostLogPathName)
Input	targetName: Target name where the script will be executed targetAbsoluteScriptPath: Full Path and name of the python script args: Script Arguments.This value can be set to NULL hostLogPathName: Full Path and name of the script log file on the hostThis value can be set to NULL to disable logging. The standard output of the script will be written in this file.
Output	None
Return value	EOK: Success. EFAULT: Invalid parameter. ENOEXEC: Python interpreter is not found on the target or the script path does not exist. EINVAL: Python script file does not exists EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. OP_API_EMODEL_RESPONDING: The target is down EIO: Error sending the request or receiving the reply.
Examples	See example start_target_python_script
Related items	OpalDisplayInformation

OpalStopConsole

Group	Model Interaction, Console
Description	Stop execution of the Simulink console subsystem associated with the current connected model. Before calling this function, the console must be executed. Please note that this function is only available on Windows and Linux operating system when the model contains a Simulink console subsystem. The client machine must have Matlab install.
Required Control	None
Usage	int OpalStopConsole();
Input	None
Output	None
Return value	EOK: success EBADF: model not specified by previous OpalConnect or OpalSetCurrentModeEINVAL not a Simulink modelEIO error sending the request or receiving the replyENOENT the model path and/or name is NULL EACCES: cannot access the modelname.subsys file (this file is generated during the model’s compilation) OP_API_SEPARATION: the model doesn’t contain a Simulink console subsytemor the format of the *.subsys file is incorrect (this file is generated during the model’s compilation).
Examples	None
Related items	OpalExecuteConsole, OpalLoadConsole, OpalPauseConsole, OpalResetConsole.

OpalStopExecutable

Group	Utilities
Description	Stops and kills an executable running as an external process on the host computer.
Required Control	None
Usage	int OpalStopExecutable (unsigned int processId);
Input	processId: ProcessId of the executable to stop.
Output	None
Return value	EOK: Success. OP_API_STOP_EXEC_FILE: Error stopping the execution of the process.
Examples	None

OpalTakeFunctionControl

Group	Utilities
Description	Takes the control of the specified function block of the currently connected model. Only one client API at a time is granted a given function block control. See OP_FUNCTIONAL_BLOCK for more information about the available function blocks. Example: In order to be able to take a snapshot of the running model, control of the snapshot function block should be first requested using OpalTakeFunctionControl(OP_FB_SNAPSHOT, 0, 0). As soon as the control is granted, the user can call the OpalSnapshot(...) function.
Required Control	Takes the control of the specified function block of the currently connected model. Only one client API at a time is granted a given function block control. See OP_FUNCTIONAL_BLOCK for more information about the available function blocks. Example: In order to be able to take a snapshot of the running model, control of the snapshot function block should be first requested using OpalTakeFunctionControl(OP_FB_SNAPSHOT, 0, 0). As soon as the control is granted, the user can call the OpalSnapshot(...) function.
Usage	int OpalTakeFunctionControl(OP_FUNCTIONAL_BLOCK fb,unsigned short fbElem, OP_CONTROL_PRIORITY priority);
Input	fb: Functional block which control is to be requested. See OP_FUNCTIONAL_BLOCK. fbElem: Functional block element which control is to be requested. This input is used to specify the acquisition group when the function block is OP_FB_ACQ_GROUP. Normally, this value is 0. priority: Control priority to be requested. Higher is the value, higher is the priority. See OP_CONTROL_PRIORITY.
Output	None
Return value	EOK: Success. EPERM: Control requested but already given to another client. EBADF: Model not specified by previous OpalConnect or OpalSetCurrentModel. EIO: Error sending the request or receiving the reply. ENOMEM: Memory allocation error. EINVAL: Invalid function block. ESRCH: Model instance id not found.
Examples	None
Related items	OpalReleaseFunctionControl, OP_FUNCTIONAL_BLOCK, OP_CONTROL_PRIORITY.

OpalWaitExecutable

Group	Utilities
Description	Waits for outputs generated by an executable. Call this function until the executable have finished (when status = 1). When the executable was started with the option OP_EXEC_FILE_OUTPUT_STDERRsetted the stdout and stderr buffer are output in two different buffer.
Required Control	None
Usage	int OpalWaitExecutable(int timeout,char * displayBuffer,unsigned int displayBufferSize, char * errorBuffer,unsigned int errorBufferSize, int * status);
Input	timeOut: Timeout in milliseconds to wait for results. displayBufferSize: Size of the allocated display buffer. errorBufferSize: Size of the allocated error buffer.
Output	displayBuffer: Pointer where the API will store the stdout and stderr output of the executable. When the executable was started with OP_EXEC_FILE_OUTPUT_STDERR(2) option, this buffer also doesn’t contain the stderr outputs. Buffer must be allocated by the user. errorBuffer: Pointer where the API will store the stderr output of the executable when the executable was started with the OP_EXEC_FILE_OUTPUT_STDERR(2). Otherwise the string is empty. Buffer must be allocated by the user. status: Status of the execution. True(1) when executable has finished, otherwise False(0).
Return value	EOK: Success. OP_API_WAIT_EXEC_FILE: Error receiving results from the executable.
Examples	None
Related items	OpalStartExecutable, OpalStopExecutable.

C-API Reference v11x and up Functions Reference

Library & Header, Throughout

OpalAbortCompile

OpalAddExtraFile

OpalAddToSelection

OpalCloseMetaController

OpalCloseProject

OpalCommand

OpalConnect (deprecated)

OpalConnectByName (deprecated)

OpalCreateAlias

OpalCreatePackage

OpalDeleteConnHandle

OpalDisconnect (deprecated)

OpalDisplayInformation

OpalExecute

OpalExecuteConsole

OpalExecuteMatlabCmd

OpalFindObjectId

OpalFreeMemory

OpalGetAcqBlockLastVal

OpalGetAcqGroupSignals

OpalGetAcqGroupSyncSignals

OpalGetAcqSampleTime

OpalGetAcqTrigger

OpalGetAcquisitionControl

OpalGetActiveModels (deprecated)

OpalGetActiveProjects

OpalGetAliasDescription

OpalGetAttributes

OpalGetBlob

OpalGetBlobsControl

OpalGetChildren

OpalGetClockPeriodInfo

OpalGetConfigurationControl

OpalGetConnectionPointsForIO

OpalGetConnectionsDescription

OpalGetConnHandle

OpalGetControlSignals

OpalGetControlSignalsDescription

OpalGetCurrentModel

OpalGetDefaultAttributes

OpalGetExtraFiles

int OpalGetExtraFiles (OP_EXTRA_FILE_TRANSFER_TIME transferTime,

OpalGetInstalledMatlabReleases

OpalGetIOInterfaces

OpalGetLastErrMsg

OpalGetModelState

OpalGetMonitoringControl

OpalGetNodeCpu

OpalGetNodeXHP

OpalGetNumAcqGroups

OpalGetNumSignalsForGroup2

OpalGetParameterControl

OpalGetParametersByName

OpalGetParametersDescription

OpalGetPauseTime

OpalGetPhysNodeList

OpalGetRtlabVersion

OpalGetRtlabLicenseExpirationDate

OpalGetSignalControl

OpalGetSignalsByName

OpalGetSignalsDescription

OpalGetStopTime

OpalGetSubsystemList

OpalGetSystemControl

OpalGetTargetFile

OpalGetTargetNodeSystemInfo

OpalGetTargetPlatform

OpalGetTimeInfo

OpalGetValueByAlias

OpalInstallRtlab

OpalInstallTarget

OpalIsOriginalModelOpen

OpalLoad

OpalLoadAliasDescription

OpalLoadAlias

OpalLoadConsole

OpalLoadOriginalModel

OpalLoadParameters