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LightUp for Revit External Command Failure

Posted: Fri Jul 14, 2017 6:28 pm
by rynenichols
This post concerns LightUp for Revit. I didn't see a forum on that site so I thought I'd try here. On certain models, when I attempt to run the Tour Tool, I get an error message saying that Revit cannot complete the external command. The first few lines of message read:

"Revit encountered a System.NullReferenceException: Object reference not set to an instance of an object.
at LightUPforRevit.LightupApplication.Export(Document doc)
at apiManagedExecuteCommand.....

The plug in works fine for other models but on others, this screen comes up. Any help would be greatly appreciated!