Model a floor

I got an error from one room trying to model a floor.
The error was the polycurve wasn’t closed. So I added some nodes to close it…
I am still getting the error. Any idea how to fix?

Originally I was just feeding in the Room outlines… but thought joining, closing and then getting curves would fix the issue (obviously has not)

Found a node I’ve not used before and it seems to have fixed the issue:

99% of the time this is due to poorly modeled walls, where there is say a column that should be flush with the wall but is off by a fraction of a mm, resulting in a line that is too short for Revit, and therefore discarded, resulting in the not closed status. While Dynamo can fix this, I recommend cleaning u p the gaps as that will result in subsequent issues that slow down model performance.