When DWG file is just linked as outside drawing, nothing bad doesn't occurs, but when I exploding it, half of MY layers are mixing up and changes their names. Everything turns a nightmare, because visible and hidden layers are mixed.
I think, that archicad must ask something like this:
" Would You like to explode inserted drawing to a single layer,
that you can chose, OR You want to merge layers of DWG with current layers. "
or something like that.
PS I've several times lost much time to recover layer names.
PPS there is no undo.
