Originally Posted by
bcgatti
If you can list the "blocks", I believe that the names will give you a hint as to what vertical they may have come from.
I just opened an AutoCAD Architecture file in Vanilla AutoCAD and the walls list as AEC_WALL, doors list as AEC_DOOR, other "blocks" have the AEC prefix on them as well.
The first explode in AutoCAD took them down to unnamed blocks that I was able to explode them as well without losing the objects. I do have the Object Enabler for AutoCAD Architecture loaded.
HTH