MATLAB Answers

Matlab crashing when importing numpy

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John Pevey
John Pevey on 17 Sep 2020
Answered: Pierre Loicq on 7 Apr 2021 at 10:10
I've been running into a problem where a matlab/python code is failing. When running this simple matlab code:
function out = python_test()
py.importlib.import_module('numpy')
I get the following following error:
MATLAB: malloc.c:2396: sysmalloc: Assertion `(old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0)' failed.
Other questions with this same error point to mis-allocating of variables. But I can't see how that could be the case in this very simple case.
Matlab version: 2019a
Python version 3.6.8
Linux version: CentOS Linux 8
Any help would be appreciated, thanks!

Answers (2)

Shantanu Dwivedi
Shantanu Dwivedi on 21 Sep 2020
Please try upgrading to MATLAB R2019b. This should solve the issue.

Pierre Loicq
Pierre Loicq on 7 Apr 2021 at 10:10
I resolved a similar problem on Matlab 2016b with this one :
https://fr.mathworks.com/matlabcentral/answers/358233-matlab-python-interface-broken#answer_283353

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