Hello there Peter, thanks for the tips. May you please tell me what do you mean by heavy duty CAE work large assembly? (meaning, number of parts and file size, that's really an important information I need), Anyway we have two Workstation HP6600W with 2 twin quad core Xeon and 16GB RAM, and to be honest I don't know weather we manage is consider large assemblies or not. I really need a comparison point of view. I must apologize if I meant Pro/E could not handle this. But when you are originally sold a software and there was no guidance nor training by the vendor about its limitations, meaning an appropriate way to model from the beginning, then comes this consequence, where apparently our only solution is to Re-arrange all our assemblies according to simp and geom reps. But what happens when you already have about 200 of this large assemblies and all of them managed by pro/program and excel?. This is not a cryout, but I'm looking through for all available option before presenting this as ultimate solution, given the extensive amount of time that this will require. Because it means re-editing all those drawing in order to make full use of the reps, purging the drawing files, etc. This is the real core to our problem, ok what you suggest, but, is that the only way to fix what is already done? Our local vendors and advisor had seen and examined our designing method extensively, and to be honest we’ve never being told that it may end in such an awkward situation… I just don’t see logical to step back and re-do all what is already done, even after you buy two 12000$ computers each by the blind recommendation from PTC and our vendor that it would let pro/e handle all what you do. Thanks again for your replies, but it’s a little bit annoying that after almost 4 years, we still can’t get Pro/E to work properly.