delete plot from existing plot

A GUI application was developed to display different pcolor plots. I have one graph area and using a scroll bar the user can change from one plot to another. Furthermore, each pcolor plot has a quiver plot displayed on top of it which can be disable via a radio button. However, when I uncheck the radio button the following error occurs:

Error using delete Invalid or deleted object.

Snippet:

windDirStatus = get(hObject,'Value');
axes(handles.graph);

if (windDirStatus) 
        windDirection = quiver (xaxis,yaxis,windUplot,windVplot);
        hold on;
else
      % set(windDirection,'Visible','off');
      delete(windDirection);

end

As you can see I also tried using set(...) Can somebody help me with this issue?

[EDITED, Jan, code formatted]

Answer 1

[Jan]

Without seeing how windDirection is defined, it is impossible to guess, why it is not a valid handle. At least the copy of the complete error message might be helpful instead of a shortened description. However, obviously this variable is not a valid handle of a GUI object.

[Mr X]

Hi Jan, thanks for you answered.

So I declared windDirection as a global variable and is being assigned as in the snippet. On the other hand, windDirStatus is a local variable.

The snippet is part of the radio button call back function and the following is whole error:

Error using delete Invalid or deleted object.

Error in menu>windDirectionButton_Callback (line 130) delete(windDirection);

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

Error in menu (line 18) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)menu('windDirectionButton_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback