Error 5001 when I use python multiprocessing module, which calls Matlab functions

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BlueDragon
BlueDragon 2024-3-23
回答： Esther 2024-3-28
I used python multiprocessing module for multiprocessing a image processs function, in which I started a Matlab engine and call Matlab functions. Then it appeared many pop-ups: Error 5001 - Unable to access services required to run MATLAB.
I tried to start the Matlab engine in main function and passed the engine as parameters to the image function, but then it appeared TypeError: cannot pickle 'weakref.ReferenceType' object.
The rough code is as follows:
def ImageProcess(data):
eng = matlab.engine.start_matlab()
...
return results
if __name__ == '__main__':
pool = multiprocessing.Pool()
results = pool.map(ImageProcess, data)
pool.close()
pool.join()

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回答（1 个）

Esther
Esther 2024-3-28
This error indicates that the MATLAB has encountered a licensing issue. Try the solutions below to resolve the error:
https://ww2.mathworks.cn/matlabcentral/answers/1814080-why-do-i-receive-error-5001-unable-to-access-services-required-to-run-matlab?requestedDomain=zh

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