I am programming a GUI.
When I want to select only one column or first three columns of an outlined matrix from previous callback step (or in the related function), I encounter an error as "Index in position 2 exceeds array bounds", while I am sure that the matrix has more than one column and when I run that outside of the GUI, it works properly.
I dont know what should I do about this issue. Please guide me by an example.
Thank you in advance