Copy'n'paste multi layer house

[cheffcook]

On SH3D 5.2a I have similar issue. I've opened 2 copies of SH3D (it is convenient for me: 1st copy - with walls only, 2nd - furnuture etc.) and tried to copy doors objects therebetween. It does not work, although worked in the previous version

[Puybaret]

I just checked and it still worked for me.
Be sure to give focus to the plan in the destination home, before pasting.
And in case you wonder how to work your way with one .sh3d file, it's possible from version 5.0 to add levels at the same level as an other one AND to make each level viewable or not.