Well, I dunno. The object still appears to exist in the Maya scene, it's just invisible, unselectable and unusable for all intents and purposes. I've done some playing around with the MA file, trying to splice the vertex information into a functioning node and whatnot, but it still doesn't appear.
Try this on... Open the .ma/.mb in wordpad and doing a find & replace on the value below. Find: #QNAN Replace with: 0 (thats a zero) then... Save as .ma/.mb I cant guarantee that this will work, but it worked for me twice in two times this has happened to me. Maya (or a goblin :poly122:) corrupts vertex data and maya…