Im getting errors while trying to access variable returned by a function in a gui file

 var=mhdtest(z1);
% var returns either 0 0r 1

%set(handles.text2,'string','Imposter')

if (var==1)

     set(handles.text2,'string','Genuine')

else

     set(handles.text2,'string','Imposter')

 end

it shows the following errors

Error using handle.handle/set Invalid or deleted object.

Error in maingui>pushbutton2_Callback (line 110) set(handles.text2,'string','Genuine')

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in maingui (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)maingui('pushbutton2_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

[Chandrasekhar]

check if there are static text, push button fields in your gui