error while zooming or editing the plot

Hi , I plotted a figure and wanted to zoom in to see some details but its not zooming I'm getting some error. { Error in ispref (line 45) exists = logical(exists);

Error in addpref (line 28) if any(ispref(group, pref))

Error in getpref (line 99) addpref(group, prefCell{i}, defaultCell{i});

Error in zoom>locGetMode (line 507) hMode.ModeStateData.DoRightClick = getpref('MATLABZoom','RightClick','off');

Error in zoom (line 247) hMode = locGetMode(hFigure);

Error in putdowntext (line 145) zoom(fig,'inmode');

Error while evaluating ToggleTool ClickedCallback }