When in the render room it's doc#.AVI and has 1/96 frames it just keeps going till I abort. All of them the same :) On windows XP Pro. This problem only happens in C5PB not when importing into other programs.(PZ3 extension) So I am 100% sure it's something I've clicked on within the program(C5PB). I can't wait to get home now, so I can try all these ideas you all have put forth. Only 5 1/2 hours to go :(.