I use Poser Pro-Pack every day with Vue 5 and have no problems at all with error messages or anything else. It is extremely stable and I have never seen a crash or even these OOM's some people talk about. I think it is due to other system configuration conditions outside of Poser and Vue. (I have Poser 4 pro-Pack on a 250 GB SATA E drive and Vue 5 on a 250GB SATA G drive running XP Pro. RAM is 1.5 GB.)