I got this tip from another post and it seems to have worked for me. I was having a nightmare time trying to use Vegas Platinum 9.0b to render a project. Whatever format I tried, I would get random crashes. I was using a couple of large JPG image files taken straight off my HD camcorder. I opened the image files in PaintShopp Pro and resaved them as JPG with 10% compression. The images still looked great but came down from 2MB to 150Kb each. Whether it is by fluke or not, my project now renders every time and in any format. So, are you including large images?