How do I troubleshoot issues with importing FMUs in Simulink?

I have to run a model which includes a FMU block and I keep recveing the following Error when I run the simulink model.

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• Error parsing FMU '/Users/sabahajhassan/Downloads/Austausch_ACS/FMU_out_P_02.fmu'.
• Caused by: Error in supplied FMU: Dynamic library file ('FMU_out_02.dylib') does not exist in FMU '/Users/sabahajhassan/Downloads/Austausch_ACS/FMU_out_P_02.fmu'. For more information, see the FMU troubleshooting documentation.

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Does anyone know how I can troubleshoot this error regarding importing FMUs in Simulink?

I tried to solve the error by using the FMU Compliance checker. But I have not found the macOS version of this tool in Internet, I also checked this link:

https://github.com/modelica-tools/FMUComplianceChecker/releases

I have a macbook and I run Simulink on MacOS.

[Angela]

What version of MATLAB are you using?

Also, I reccomend checking out this one where the same error occurred:

https://www.mathworks.com/matlabcentral/answers/396057-why-do-i-get-an-error-regrading-missing-dll-when-importing-an-fmu-file-to-fmu-block-in-simulink-r201

[Saba Hajhassan]

Its R2021b, the version.

The model actually runs on a windows PC. I dont know why I get this error on may macbook.

I have tried the link, but I did not work on my macbook.

Do you have any other suggestions?

[Vedant]

Hi,

Looks like the FMU's binary files are not found by the system. The easiest way to check this would be check the .fmu file. The .fmu file is merely a zip file. For example, doing the following:

mkdir p_fmu
unzip FMU_out_P_02.fmu -d p_fmu

adds the FMU content the the directory p_fm. Under the binaries directory, you can find whether the required shared library, .dylib exists.

You can check and edit the file path if it doesn't match with what the Simulnk is searching for, i.e. "/Users/sabahajhassan/Downloads/Austausch_ACS/FMU_out_P_02.fmu", here.

mv p_fmu/binaries/darwin64 /Users/sabahajhassan/Downloads/Austausch_ACS

Hoping that your path is correctly set, move forward to repackinfg the FMU, rename it back to the orignal name, `FMU_out_P_02`:

cd <path>/p_fmu
zip -r ../FMU_out_P_02.fmu ./*
cd ..

[Saba Hajhassan]

Hi,

thank you very much for your comment. I applied step by step your comments. Unfortunately, I still recieve the same Error:

Error parsing FMU 'FMU_out_P_02.fmu'.
Caused by: Unable to find file 'FMU_out_P_02.fmu' on MATLAB path. 
Component:Simulink | Category:Model error


Error parsing FMU 'FMU_out_Q_02.fmu'.
Caused by: Unable to find file 'FMU_out_Q_02.fmu' on MATLAB path.
Component:Simulink | Category:Model error

I have also run the code you which you wrote here, and I run it in the terminal of the folder. Here is a screenshot of what I got after running the code:

Do you have any other idea which might helo me to run this file?

As I said before, it runs on a windows but I do have still problems running it on the MacOS and it does not work on macbook.

Best regards :)

[Vedant]

Hi Saba,

Thanks for informing.

I was observing the screenshots you had attached:

I can see that there are no binaries for MacOS, and the FMU looks compiled for Windows-specific. Can you check and confirm once if that's the case? Until we have a .dylib, after unzipping, we can not proceed forward with resolving the error.

[Saba Hajhassan]

Hi Vedant,

thanks for your response. Yes, I checked and there is no .dylib file after unzipping. Do you have any idea how i can get these dynamic library on macOS?

Morevover, I recevied the FMU files from someone else who designed this FMU, he works on a windows OS.

Best regards

[Ayush]

Hi @Saba Hajhassan,

You can re-generate the binaries since you mentioned in windows it's working fine but in MacOS it's not due to change in platform.

Kindly take a look at the following answer to know more about it:

Can I cross-compile when exporting my FMU in Simulink Compiler? - MATLAB Answers - MATLAB Central (mathworks.com)

Hope it helps!