Problem with Floor Finish script

I have a problem with script for floor finishes.
When I press RUN it comes out with a warning shown in picture 1. Also, in 3D view a strange void walls appear (Picture 2).
I attached script so you can see what I did wrong.

Floor Finish.dyn (24.7 KB)
Thanks for help.

Hi, it’s hard to help you without seeing the whole graph, but, based on that warning, the problem is on the nodes connected to “outlineCurves”, please provide the rest of the graph so that we can give further advice

Here it is.

Thanks for the help.

Ok, nice, have you tried the node Room.FinishBoundary?