This is a known issue with Poser and Windows 2000 & Windows XP. Curious Labs suggests adjusting your swap file size to fix the problem. I've successfully reinstalled Poser on a different hard drive and fixed it myself. After that, if I got the error, it meant I had to defrag the hard drive. Believe it or not, sometimes Poser is telling you the truth when you get that error message. I think we sometimes underestimate the amount of room our hard drives need to render and run our software. I can't help notice you didn't tell us how much free space is on your hard drive.