Ok, I know this is going to sound technical, but it also has to do with the dynasty and error 12. I made a few inquiries today and spoke with a couple of computer geeks and basically I already knew this, but I tried anyway, when files get very large, like our dynasty files or legacy files and you put as much content on those large lots, you are taking up memory, as you guys already probably know. You add a few more sims, sprinklers running, tvs, stereos and anything else that moves, plus your sims, you are probably exceeding the amount of memory that your game can save with. If the game has exceeded its memory for the particular game, then your going to get the error messages. I don't even get them on any other game, but my dynasty. I can play the others all day and half the evening and have no problem, but I play the dynasty and try to save, forget it. So, the answer is to limit your content, like stereos, etc. and anything that runs. Then you add ghosts to the mix and gnomes that turn everything on, then your overloading your game. I don't know why some people have the problem and some don't, but I am going to try another dynasty and this time have very limited items running. One major game and tv room, with one stereo and one tv. Just build large enough for the museum pieces and that is it. It might look funny or small, but if I can complete a dynasty that way, then so be it. I am going into this with my eyes wide open and just assume when I get so far, it will have a meltdown, lol, and then if it doesn't, yay for me. I will complete a dynasty if it kills me, haha. Just thought I would pass that on. I have been running around trying to buy video cards and that is just not the answer, besides, I found out my computer liked the old one better, lol. Hope this explains or helps someone else.