thank you for the reply,

Export/Reimport was for example - when i construct a "special hole" with different objects, export it for use in the library.

But the same problem is when i download this object:
http://www.sweethome3d.com/models/roundDoorFrame.zip
When i import it (door/window option checked) there is no cutout in the wall?
Same with the "arc.zip" i've downloaded from this thread.
http://www.sweethome3d.com/support/foru ... 3747#17527
See my screenshot
Thank you.
Kind Regards Pete