Overview Every now and then we'll start rendering a project and one of the VelocityHD generated files will crash Vegas.
Best Solution:
Go to the capture system, Flag, and render the VelocityHD processed file using Vegas 9.0 and the AVI BM render template. The render will say that it is doing no changes or whatever, and the resulting file should be the same, but the render of the project should now work using the new file.