What randym77 said. Poser (and especially the Cloth room) fragments memory and so can't do it's stuff.. ALWAYS, before you start a simulation, SAVE! That way, all your settings will be preserved, so you don't have to go through the whole procedure again.. Another thing which can cause the cloth room to fail is if you have part of the cloth getting trapped between too-close areas of the figure. The armpits when the arms are close to the figure are a favourite for this.. And DON'T add any hair before the sim! Especially if the hair is a .hr2 file (ie, a prop) and the cloth intersects with it. When you add the figure in "collide against", the hair will get included ('cos it'll be in the heirarchy), and you then have to remember to delete it from the list.... There are many other reasons, but those are the major ones I usually stumbled against before I learned better..:-)) There really ought to be a "Tutorial/FAQ/HowTo" in the backroom or somewhere which gives a run-down on how to use the cloth-room efficiently.... Cheers, Diolma