Matlab 2021a - MCLMCR_UNK​NOWN_ERROR​_INITIALIZ​ING_MCREN

Im getting this error with python 3.7 on matlab runtime 2021a:

Traceback (most recent call last):

File "test.py", line 10, in <module>

Test = Test.initialize()

File "/root/mat/Test/__init__.py", line 322, in initialize

return _pir.initialize_package()

File "/root/mat/Test/__init__.py", line 270, in initialize_package

package_handle.initialize()

File "/usr/local/MATLAB/MATLAB_Runtime/v910/toolbox/compiler_sdk/pysdk_py/matlab_pysdk/runtime/deployablepackage.py", line 37, in initialize

mcr_handle = self.__cppext_handle.startMatlabRuntimeInstance(self.__ctf_path)

SystemError: N10foundation4core6except9ExceptionIN3MCR6mclmcr37MCLMCR_UNKNOWN_ERROR_INITIALIZING_MCREN13pysdk_runtime16RuntimeExceptionEvEE

Im using Ubuntu 16.04 installed only with Matlab Runtime R2021a (9.10) and Python 3.7 in an OpenVZ virtualization.

I have made this tests:

-Installing Matlab Runtime R2021a (9.10), Python 3.7 in windows and everything works fine.

-Installing Matlab Runtime R2019a (9.6), Python 3.7 in Ubuntu 16.04,compile Test rutine for that Runtime version, in OpenVZ and everything works fine.

-Installing Matlab Runtime R2021a (9.10), Python 3.7 in Ubuntu 16.04, in VirtualBox and everything works fine.

*Test rutine only make a calculation and return

*test.py code:

import Test
import matlab
Test = Test.initialize()
result = Test.Test(1 ,nargout=1)
Test.terminate()
print(result)

Any ideas what is thar error? i been searching everywhere and dont find anything like that "N10foundation4core6except9ExceptionIN3MCR6mclmcr37MCLMCR_UNKNOWN_ERROR_INITIALIZING_MCREN13pysdk_runtime16RuntimeExceptionEvEE"

[Zheng XinXing]

I am also meet this issue

[rich Richard]

I am also meet this issue

[Divyanshu]

Hi Martin,

A possible reason can be a clash between different versions of MATLAB Runtime in your system. So I would recommend to uninstall all the versions of MATLAB Runtime and then do a fresh install of a compatible version.

You can refer the following documentation link for details about how to uninstall MATLAB runtime in linux machines:

https://in.mathworks.com/help/releases/R2021a/compiler/install-the-matlab-runtime.html#bvf6cc3

Hope it helps!