I find the Room.Boundaries nodes of Clockwork and Archi-lab.net could not identify Curtain Panel in Revit 2021, yet it works in Revit 2020.
This node is used in Generative Design worked example: Workspace Layout
RoomBoundaries 2020.dyn (26.5 KB) RoomBoundaries 2021.dyn (22.9 KB)
I use rac_advanced_sample_project as the sample model