There is a reported memory leak of about 4 MB lost per frame, and my own observations seem to confirm this. If you are rendering a 10 second animation in 300 frames, you will lose 1,200MB memory (1.2 GB) during the process. Therefore, if you're starting with more than an 800 MB rendering footprint, this will push the memory use over the addressable 32 bit 2GB limit and Poser will crash. Bill