"I hit undo around 4 times, mesh didn't come back, said there was nothing more to undo." Then when you hit re-do it says no more re-do, right? I've had this happen on 90% of my models and I have no friggin idea why! Annoying as hell, isn't it? I searched high and low and couldn't find any mention of the problem. Luckily I…
? Weird, I never got an e-mail from you. There is something nasty in that file. Or it's some kind of broken node connection or something. I would export as an obj into a clean file for starters.