I recently upgraded to Vegas 8.1, 64 bit. I now have a problem with rendering MPG-4 files to upload to YouTube or Vimeo.

I get the following message..."An error occoured while creating the media file xxxxx.mpg. Error 0x80010105 (message missing)"

I'm trying to render a MainConcept AVC/ACC *.mp4 Interesting to note I did not have a problem with the *.mp4 format when I was rendering an HD version?

I have tried setting my threads from 16 to 1.
I have tried running in compatibility mode for Windows Vista (in admin setting).
I have tried setting my ram from 0 to 4000.

Any other ideas?

System: I920, 8gb ram, Windows 7, and Vegas Pro 8.1.