MATLAB: GUIDE callback question

callbackguide

I have a button group (tag: DBI_ButtonGroup) with two radio buttons (tag1: radio_DBI tag2: radio_non_DBI)
My selctionchangefcn callback is as follows:
% --- Executes when selected object is changed in DBI_ButtonGroup.
function DBI_ButtonGroup_SelectionChangeFcn(hObject, eventdata, handles)
% hObject    handle to the selected object in DBI_ButtonGroup 
% eventdata  structure with the following fields (see UIBUTTONGROUP)
%  EventName: string 'SelectionChanged' (read only)
%  OldValue: handle of the previously selected object or empty if none was selected
%  NewValue: handle of the currently selected object
% handles    structure with handles and user data (see GUIDATA)
switch get(eventdata.NewValue,'Tag') % Get Tag of selected object.
    case 'radio_DBI'
        set(handles.no_ADC,'Enable','Off')
    otherwise
        set(handles.no_ADC,'Enable','On')
end
So I basically want to change the tag called no_ADC (which is an edit text control, to Enable = off or Enable = on based on the radio button selection. When I run this, however, MATLAB spits out the following error:
Error using handle.handle/get
Invalid or deleted object.
Error in uitools.uibuttongroup/childAddedCbk>manageButtons (line 59)
oldctrl = get(hgroup, 'OldSelectedObject');
Error while evaluating uicontrol Callback
I don't understand what is wrong.

Best Answer

The code is correct. The problem seems to be caused by operator error when modifying the GUI elements. Root cause is unknown. See comments.
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