I've had this more than a few times and deleting the simulation and creating a new one fixed all but one.....the one it wouldn't fix was a top for kate that i had simulated from the zero position to the default position then exported, i reckonthe problem was all the polygons bunched up under her armpits was confusing poser, to fix that i ran a simulation from the default pose back to the zero pose and used the resulting obj......Steve