So I was trying to render a lossless .avi of an 8-minute video but every time I tried I failed. It said 'An error uccurred while creating the media file video.avi. The reason for the error could not be determined', leaving a video file with a length of 1:56 and a size of 12.0gb. Annoying.
I'm using a x64 version of Vegas 12.0 on WIN 7 64.