MWArray assembly failed to be initialized

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Hi,
I am running and developing this App for long time, I am using a .Net that was compiled with Matlab Library Compiler.
Suddenly today the App stoped working withe the message:
---------------------------
Matlab Error
---------------------------
Error initiating Matlab Library System.Exception: MWArray assembly failed to be initialized ---> System.Exception: The MATLAB Runtime instance could not be initialized ---> System.ApplicationException: The MATLAB Runtime instance could not be initialized
segv - SEVERE ERROR
at MathWorks.MATLAB.NET.Utility.MWMCR..ctor(String componentId, String componentPath, Stream embeddedCtfStream, Boolean isLibrary)
--- End of inner exception stack trace ---
at MathWorks.MATLAB.NET.Utility.MWMCR..ctor(String componentId, String componentPath, Stream embeddedCtfStream, Boolean isLibrary)
I tried to recompile, reinstall the real time engine install previous version and still getting this message.
I am not sure what changed. I installed the App in a different computer and no problem at all.
Your help will be greatly appropriated.
Thanks
Sharon

Accepted Answer

Kojiro Saito
Kojiro Saito on 13 Feb 2020
Your MATLAB Runtime cache folder might be corrupted.
Delete the cache folder.
%TEMP%\USER\mcrCacheX.X
If your Windows account is usera and MATLAB Runtime version is 9.3 (R2017b),
the above folder would be
C:\Users\usera\AppData\Local\Temp\usera\mcrCache9.3
After deleting this folder, you can freshly launch your compiled application.
  12 Comments
Rohith Ramaiah
Rohith Ramaiah on 25 Oct 2022
Issue occured on Matlab Runtime 9.8 as well. But these steps resolved it. Thanks!
Onur Demirer
Onur Demirer on 28 Nov 2022
Thank you very much, I was going crazy looking for issues elsewhere and this worked like a charm!

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