Impossible saving of GUI

Hi I try to modify a GUI. The application works correctly, but any modification of the GUI cannot be saved anymore. This GUI was developped and was working without problem before Matlab2014. I don't understand the error message that seem to mean that the problem come from matlab function "guidefunc" and "guidemfile".

Error message window is the attached document.

[Adam]

Were you debugging in the program at the same time as making changes in GUIDE?

I have done this on numerous occasions and GUIDE does not like it. I always have to just close GUIDE and redo my changes after stopping the debug in that case.

I can't remember if this also ever happens just when the program is open when I change its GUI.

[Vincent Gigot]

Ok problem just solved with a change of folder and resaving in the former folder...mystery for me but it seems that my GUI can now be modified and saved again.