Unknown hook 'FMUExportTestingMode'. Either no such hook is registered or the module registering the hook is currently not loaded.

I'm trying to run a script that generates FMUs using the MATLAB function exportToFMU. I ran it successfully many times yesterday. When I started MATLAB today and ran my script I got this error message:

Error using GenerateFMUs (line 12)

Unknown hook 'FMUExportTestingMode'. Either no such hook is registered or the module registering the hook is currently not loaded.

The code I use to generate the FMUs:

exportToFMU(modelName,'FMIVersion','2.0','FMUType','CS', 'CreateModelAfterGeneratingFMU', 'off', 'supportMultiInstance', 'on', 'SaveDirectory', outputFolder, 'FMUName', fmuName64Bit)

exportToFMU(modelName,'FMIVersion','2.0','FMUType','CS', 'CreateModelAfterGeneratingFMU', 'off', 'supportMultiInstance', 'on', 'SaveDirectory', outputFolder, 'Generate32BitDLL', 'on', 'FMUName', fmuName32Bit)

UPDATE 1:

If I open and close Simulink once, the error goes away and I am able to generate FMUs.

UPDATE 2:

Added code example.

[Jacob Mathew]

Hey Nils, could you share the model ?

[Nils Lande]

Sorry, can't share the model. It's a simple model containing a single 'MATLAB Function' block and some input- and output-ports.

I'm pretty sure that the model doesn't matter. It looks like something is beeing initialized when Simulink is started. Probably something in the ' FMU Builder for Simulink® support package'.

Answer 1

[Nils Lande]

The solution is to call load_system() before calling exportToFMU():

load_system(modelName);

exportToFMU(modelName,'FMIVersion','2.0','FMUType','CS', 'CreateModelAfterGeneratingFMU', 'off', 'supportMultiInstance', 'on', 'SaveDirectory', outputFolder, 'FMUName', fmuName64Bit)

exportToFMU(modelName,'FMIVersion','2.0','FMUType','CS', 'CreateModelAfterGeneratingFMU', 'off', 'supportMultiInstance', 'on', 'SaveDirectory', outputFolder, 'Generate32BitDLL', 'on', 'FMUName', fmuName32Bit)