Unknown Geometry by import ifczip in Rendered Image

Hi all.

I have question about using .ifczip in blender.

I always use ARCHICAD and I wanna export ARCHICAD mesh data to blender for rendering.
I found the solution by exporting .ifczip in ARCHICAD and importing it in blender.
However I have a bit problem.
When I render image the meshes , There are unknown meshes which is not displayed in Viewer.
It seems to generate at window and door position in ARCHICAD.
Do you have any ideas to solve ?
Thank you.

Export OBJ or FBX, it’s listed on documentation.