Geometries failed to convert

I am new to Dynamo. I got this error while trying to make a 3D room.

One or more geometries have failed to convert due to this error: trim_with_edge_loops requires all curves to touch surface

Can you show the contents of the All Elements of Category node?

I have but the same problem is still happening.

Do you have any unplaced rooms?

No. I have created a room schedule and deleted all not placed rooms.

Any rooms with a center opening - that is shaped like a doughnut in plan?

@tolux364 This is a known issue has already been discussed here:

Workaround would be to extract core boundaries of rooms and extrude them as solids if your walls are not slanted. Let us know if you face any issues. Hope it helps!