here is a bit of my code from my matlab project, the first 3 function works, but the resolve function doesn't work! it display Not enough input arguments. Error in lay_out>resolve (line 129) X11 = handles.mydata.b * handles.mydata.c; Error while UI

function a1(hObject, eventdata, handles)
a = str2double(get(hObject, 'String'));
if isnan(a) 
    set(hObject, 'String', 1);
    warndlg('Only numbers are supported', '!! Warning!!');

elseif(a==0) 
    set(hObject, 'String', 1);
    [cdata,map]=imread('zero.jpg');
    z=msgbox('a cannoct be zero for a quadratic equation','Try again', 'custom', cdata,map);
end

% Save the new a value
handles.mydata.a = a;
guidata(hObject,handles)
end
function b1(hObject, eventdata, handles)
b = str2double(get(hObject, 'String'));
if isnan(b)
    set(hObject, 'String', 0);
    warndlg('Only numbers are supported', '!! Warning!!');
end

% Save the new b value
handles.mydata.b = b;
guidata(hObject,handles)
end
function c1(hObject, eventdata, handles)
c = str2double(get(hObject, 'String'));
if isnan(c)
    set(hObject, 'String', 0);
     warndlg('Only numbers are supported', '!! Warning!!');
end

% Save the new c value
handles.mydata.c = c;
guidata(hObject,handles)
end
function resolve(hObject,eventdata,handles)

X11 = handles.mydata.b * handles.mydata.c;
set(handles.x11, 'String', x11);

end

[Walter Roberson]

Merged into duplicate http://uk.mathworks.com/matlabcentral/answers/261751-error-while-evaluating-uicontrol-callback