questdlg() functions does not dsiplay default buttons or user defined buttons

which questdlg

>> C:\Program Files\MATLAB\R2018b\toolbox\matlab\uitools\questdlg.p

I tried using the questdlg.m files by temporarily removing .p files and it still didn't work. Looks like for some reason questdlg.p files keeps getting corrupted. I am not able to create new .p files using pcode function.

When I copy the questdlg.p file from the same version matlab from another system it works for sometime and again start getting the dialog box without any buttons.

[Guillaume]

You should never mess with any file in C:\Program Files (be it matlab or otherwise), it's a sure way to irreversibly corrupt programs. At this point, I would recommend reinstalling matlab rather than copying files from another system.

You should show us the code you used to generate the dialog.

[Deependra Mishra]

questdlg('Would you like a dessert?', ...
	'Dessert Menu', ...
	'Ice cream','Cake','No thank you','No thank you');

I used the code from the documentation example. I tried messing with files in C:\Program Files only after I was having issue with multiple system. I have tried this both on mac and windows pc. I am not getting the default buttons. I messed the files in windows PC which has Matlab R2018b. When I said I copied the file from other system. I copied the questdlg.p file from another windows machine which has MAtlab R2018b.

In mac, i have MATLAB R2019a installed, haven't messed with any files and still when executing above code I have the same issue. The output of

which questdlg

in mac is as follows:

/Applications/MATLAB_R2019a.app/toolbox/matlab/uitools/questdlg.p