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ubuntu 20.04 - Matlab crashes when using parfor

I run the following code in parallel, but Matlab crashed.

n = 200;
A = 5000;
a = zeros(1,n);
parfor i = 1:n
     a(i) = max(abs(eig(rand(A))));
end

The validated information of my Matlab cluster

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I am new to Ubuntu. I have raised the limit of open files to try to fix the error but fail as well.

enter image description here

The crashed message of Matlab.

enter image description here

question from:https://stackoverflow.com/questions/65859499/matlab-crashes-when-using-parfor

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