Originally Posted by
smintz
Also keep a few additional points in mind:
1. You'll have to upgrade your file. Simply open an RS2 central file in RS3 and the process will begin. We've had a large model take up to an hour to upgrade. I've also found I've needed to reload some families from the new version to avoid additional errors.
2. As mentioned before, you can't backsave.
3. And the biggy: All members of the design team must be on compatible versions.
Revit Building 8.1 = Revit Structure 2
Revit Building 9 = Revit Structure 3 = Revit Systems 1
Revit Building 9.1 = Revit Structure 4 = Revit Systems 2
Confusing, isn't it?