Hi! It is my understanding that you are getting License Manager Error -1. As you correctly mentioned, the error you encountered is not related to a license issue. It occurs because using the "multiprocessing" Python module from MATLAB is not a supported workflow, as indicated at the following link:
However, running the following commands in MATLAB may resolve the issue:
>> [v,exe] = pyversion;
>> py.multiprocessing.forking.set_executable(exe);
The "set_executable" command will set the executable used by the Python multiprocessing module to be "exe", the Python executable.
If you observe the appearance of three Python terminals, it is because running Python scripts with “python.exe” typically opens a terminal upon startup, as stated on the Python website.
To suppress the terminal window and avoid multiple terminals, you can run your scripts with “pythonw.exe”. “pythonw.exe” is usually located in the same directory as “python.exe”. To execute your Python script using “pythonw.exe” within MATLAB, you can use the following commands:
>> [v, exe] = pyversion(<pythonw.exe location>);
>> py.multiprocessing.spawn.set_executable(exe);
Hope this helps.
