Prepping a compilation of WMVs with the above script. Gets to the end of the video render then just stops - can't cancel or anything, have to terminate Vegas.
Occasionally it does succeed, but only the VIDEO_TS foloder has any contents. All temp folders (etc) have plenty of space.
I'd suggest there is a corrupt file in one of the WMV's. DVD Prep is only a script, calling forth much of what Batch Render does. It doesn't actually touch media. WMV to DVD can be a problem; your CPU may also be overheating.
Vegas cannot be canceled easily during a scripted process.