So I followed the instruction from this Autodesk video: https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/simplecontent/content/use-dynamo-to-report-room-width-and-length-revit-room-tag.html
My script works just fine in one project, but not in another project. I am getting an empty list error. How can I fix it?
script with error:
script without error:
Again, this is the same Dynamo script being run on two different projects.
What is causing the empty list??