matlab gui error handles.slider

Hi, I have this error, can you please tell me, how to solve it? thanks Undefined operator '+' for input arguments of type 'matlab.ui.control.UIControl'.

Error in exam_01>slider_Callback (line 206) xlim([handles.slider handles.slider+handles.dif])

Answer 1

[Rik]

The information is in the error: handles.slider is an object, not a value. If you want to use the value property, use get(handles.slider,'Value') or handles.slider.Value.