Error (pop_editset(): cannot find specified variable.,)

Hi, i m relatively new to matlab and would like some advice in resolving this issue.

I m trying to import an excel file .csv/.xls to my EEG Lab but the error below keeps showing even with another different dataset.

Steps that i did to replicate the error.

File>Import Data>Using EEGLabs functions and plugins>From ASCII, float file or MATLAB Array

My matlab version is R2022a and EEGLAB v2022.1

[Jan]

Set a breakpoint in line 467 of the file pop_editset(). If Matlab stops there, find out, which variable is not found.

[Amalia]

How do I set a break point ?

Thank you