GAmultiobj optimisation boxdirections error

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Hi everyone,
when using he GAmultiobj algorithm for my problem i get the following error
PS:i'm using a population of 20 with 50 generation and 7 optimisation variable, when the error occurs the MeshSize=[]
Error using /
Matrix dimensions must agree.
Error in boxdirections (line 22)
pollParam = 1/sqrt(MeshSize);
  8 Comments
Alan Weiss
Alan Weiss on 3 Dec 2021
I do not understand how this can happen. You say "when the error occurs the MeshSize=[]". My reading of the code indicates that the mesh size should always be a strictly positive number, never zero or empty.
I wonder if this is somehow related to your placing gamultiobj inside of another function call. What happens if you call gamultiobj directly on your problem? I mean, set up the problem variables and call gamultiobj manually, not within another function. Do you get the same error? If so, what are the inputs to gamultiobj?
Alan Weiss
MATLAB mathematical toolbox documentation

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