Error evaluationg 'OpenFcn' because of a waitfor command

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Hi,
I have a gui, that when close with a cancle or the X at the top right corner of the gui will give me this error :
The reason why i get this error is because in my program i have a waitfor command that waits for the user to click on pushbutton to allow the rest of the programm to run (that waitfor command is pretty essential for the programm). This error happens if the gui is closed before the pushbutton associated to the waitfor command is pressed.
Is there a way to not have this error message without removing the waitfor ?

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Rik
Rik il 17 Ott 2022
You need to use return instead of guidata(hObject,handles) if the figure no longer exists.
If you want more specific advice, you will have to show more specific code.
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Rik
Rik il 18 Ott 2022
You should put a call to drawnow in your loop. That way, you tell Matlab to execute any queued graphics changes/interactions, including button callbacks.
Calling pause (with some value as an argument) will have a similar effect. The reason it works in the debugger is that every time the code execution stops, callbacks are processed.

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