Genetic Algorithm Optimizatioin - Error

I was trying to run my GA optimization code on Matlab R2019b but unfortunately, I have got an error that states the following: One or more output arguments not assigned during call to "varargout".

For information, my code has been run on R2017a many times without getting out this error.

Any advice please.

[Walter Roberson]

What shows up for

which -all rng

[Abderrahmane DADA]

Here is what was showed up:

C:\Program Files\MATLAB\R2019b\toolbox\matlab\randfun\rng.m

Answer 1

[Walter Roberson]

D:\Matlab\mrst-2018a\modules\octave\rng.m

You need to get that off of your MATLAB path. There is also a fair risk that other files in the same directory will interfere with using matlab

[Abderrahmane DADA]

I have removed the other Matlab versions and it works fine.

Thanks.