this is my story: I've been working hard on a family of parts design where all the different styles shared some components, not enough to use configs effectively but enough to use swexplorer to start each new design with a copy of the last one. One design had a hinged part that I set up an animation to verify (and show my client via an edrawing) that there was adequate clearance for the item to swing open. After I made the animation I forgot about it. Several designs later, (and at the end of a long and hectic 3 days meeting a deadline) I was at the end ONE more PDF to print and I'm done!! Oh yea. I use the saveas pdf which (this is an aside) has suddenly become very flakey, randomly rotating certain pages to portrait mode. This happened several times, so I resorted to printing a pdf, this also wouldn't work!???? what's going on, come on it's my last drawing.... etc etc. Adobe just hung on page 4 or something. In desperation I thought, hey, I'll save the drawing as an edrawing and print the pdf from there, maybe it will work better. So I save the edrawing, then open it in edrawing viewer. I see a message something to the effect 'animation paths blah blah update blah zero point blah blah etc' (remember I'm in a frantic hurry at this point (it's 5:15) my sons school bar-b-q is in 15 minutes..... So I click yes (or was no) I honestly can't remember. What happens is.... a long pause....... I see a message in the lower left corner saying rebuilding feature x of y etc. A long time passes.................... it gets longer...............(assembly is about 42 parts)..........it finishes...........and kaboom! my assembly is totally f***ed up. Busted beyond recognition, somehow the old animation had rewritten a couple key distance mates which when it rebuilt cause offset geometry to turn yellow (the kind you can't fix). Now it's 5:20 Honestly the old animation (which I gather is like a config) got activated and seriously broke the assembly. It's still not fixed. It was the edrawing viewer which initiated this rebuild (yes sw was open at the time) I'm totally shocked....