I'm using the Atlas Viewer (v2.18.1, R202b). When I try to save the viewer state I receive the following error. Can you please help with this issue? 

I'm attaching the error message for your perusal. 

Thank you!

Error using save
Variable 'vrnum' not found.

Error in saveObjects (line 21)
eval(cmdstr);

Error in AtlasViewerGUI>menuItemSaveViewerState_Callback (line 1650)
saveObjects('atlasViewer.mat', ...

Error in gui_mainfcn (line 95)
feval(varargin{:});

Error in AtlasViewerGUI (line 19)
gui_mainfcn(gui_State, varargin{:});

Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)AtlasViewerGUI('menuItemSaveViewerState_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating Menu Callback.