Hello, I can't seem to overcome the following error coming up during subject's Save Viewer State:

I'm using:

- source version v2.18.1

- in MatlabR2020b with

- MatlabRuntime 2017 9.3 

- on PC (Windows 10 Pro)

The subject data are in .snirf format collected with NIRSport2. 

Since I'm new to AtlasViewer, I'd appreciate any pointers. 

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.