How to to deal error “Unable to launch MVM server: License Error: Error checking out license” when attemptting to call matlab function through python?
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When I run a python code which call some matlab function on linux server, the err message returns as follows:
Traceback (most recent call last):
File "LaplacianMatrixMatlabEngine.py", line 20, in <module>
engine = matlab.engine.start_matlab()
File "/home/task3/dylan/anaconda3/lib/python3.7/site-packages/matlab/engine/__init__.py", line 117, in start_matlab
eng = future.result()
File "/home/task3/dylan/anaconda3/lib/python3.7/site-packages/matlab/engine/futureresult.py", line 67, in result
return self.__future.result(timeout)
File "/home/task3/dylan/anaconda3/lib/python3.7/site-packages/matlab/engine/matlabfuture.py", line 87, in result
handle = pythonengine.getMATLAB(self._future)
matlab.engine.EngineError: Unable to launch MVM server: License Error: Error checking out license
so how can I deal this error to make my code work?
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Answers (1)
Lucas Bezerra
on 15 May 2023
In my case I was using conda and I activated the Matlab license in the base environment, but not in the one I was actually using to run the matlab.engine. So I ran the activation script in the current environment directly:
bash /usr/local/matlab/bin/activate_matlab.sh
and it worked! This script requires a display though, so you should look for an alternative if you don't have one, e.g., you're running this on a cloud server with no RDP available.
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