Hi guys,
Not sure why this node is not working as expected. The initial list of curves are ellipses so break them down in 2.
I’m open to any suggestion 
What does the error say?
Sorry about that
interestingly enough they get created but all stack on the first level.
Changing the lacing will get me this
Seems like the first image is creating the first floor loop on all supplied levels. That’s still the only loop to get created. I think the others still need to be simplified into arcs and curves.
Depeding on lacing it will create 30 floors but all on the bottom levels.
Very weird
Hmm. The error is implying that the curve loops are invalid. Weird that it still creates each floor layout on the first level then. Can you try creating all floors one level at a time to see if that acts any different?
Also, how are you creating your levels? It almost seems like they’re the issue here.