How to fix this errot

Cannot find an exact (case-sensitive) match for 'GUI'

The closest match is: gui in C:\Users\mmahi\Desktop\Spring 2021\Signal 2\project\DTMF Decoder\New folder\gui.m

Error while evaluating UIControl Callback.

Answer 1

[Image Analyst]

Check all the callbacks in GUIDE. Make sure all of them say gui, not GUI. Or vice versa. The main thing is they all have to be consistent capitalization. Everywhere you see gui in GUIDE or MATLAB's m-file, all the gui's must be the same capitalization.