Creating standard viewports

[carch]

I have one project file with trying to create a new standard viewport (under FILE) I get this message.

1. use the existing layerMap G

2. Import & use the standard layerMap G

3. Delet the layerMap G worksheet when finish.

Not sure which one to pick. When picking any of them i get this message. "A VectorScript Error has occured. Refer to the file "Error Output" for further expansion." I have an option to view the error, "Error: _3336 _3339 - Index outside array limits."

I'm using OSX vectorworks 11.5

The file has been working fine up to this point.

Chris