This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, please read below for any possible workarounds:
This is a bug in MATLAB 6.5 (R13) in the way that GUIDE handles setting property values using Property Inspector. Our development staff is investigating this issue.
Currently, to work around this issue, try setting the "UIContextMenu" property of your uicontrol to [] in the "OpeningFcn". For example:
function test_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
set(handles.pushbutton1,'UIContextMenu',[])
guidata(hObject, handles);
Alternatively, you can also use the following workaround:
1. Create a new context menu in the Menu Editor.
2. From the Property Inspector, set the "UIContextMenu" property to the new context menu.
3. In the Menu Editor, delete the new context menu by highlighting it and then clicking on the trash can icon.
4. In the Property Inspector, you will see the "UIContextMenu" has been reset to "None".
