Error in Figure CloseRequestFcn

Error in

matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)main4('figure1_CloseRequestFcn',hObject,eventdata,guidata(hObject))

Error while evaluating Figure CloseRequestFcn.

can someone tell me how to get rid of this error?

[Walter Roberson]

There would have been at least one more line of error message before that, telling us what MATLAB thinks is wrong.

Is there a function figure1_CloseRequestFcn inside main4.m ?