Don't forget Poser is really bad with memory. Check that you've done these things recently too: emptied Temp, emptied Temp Internet cache, defragged, etc. It should be ok on your system. Also if you've been working with Poser for some time and have loaded a variety of items with large textures and done many renders it's a good idea to restart the computer. I only have 1GB of memory so I get this often with large textures and have to improvise. :( Good luck :)