Buiding entity damaged during clipboard paste & crashes the GEM editor

[FrozenBullet]

All the GEM pros,..... when ever I copy a building in f2 mode, it copies as 1 entity but when ever i paste it , it pastes as 15 or 25 whatever entities (though, in single form),...... & afterword some pasting whenever I try to paste another building entity it shows in pieces (Damaged). mind u here, the entity name is blank & the slot id is changed to "0xffffff" something like that. now if I try to delete this damaged entity or building, the editor crashes.
It says" the application requested c++ run time to force shutdown"

I have installed, reinstalled MOWAS & Windows several time but the problem aint solved.

Can any one plz tell me something about this....... I can't edit no more...