I second Anton's opinion. Poser does not appear to be programmed to respect the absolute 2GB address limit imposed by Windows. So when it hits it, all bets are off. The failure mode will be unpredictable, but potentially spectacular. The longer and/or harder you push Poser, the more often you need to save and restart. Sadly, each version of Poser gets worse in this respect, as more code with the same gawd-awful memory management (a ka none) means less room for WIP.