Select Linked Rooms - Get surface and Place Floors

Hello!, I’m trying to place floors on Rooms hosted by a Linked Model

Really would help if would show the output (preview) of the nodes and also tell what the warnings are.

But my first guess is that it is a Level and / or Lacing issue.

Not that all rooms would have been placed in the model. So check first, for the area of the room. If a room is placed, then the area will be greater than zero. Filter using this check.

Here in the image, the four walls and a room enclosed by them, are from a Linked model and the highlighted floor is created in the host model.