Video File Read Error

Hi,

I have just encoded 4 short films with Compressor & A.Pac, and reasonable bit rates (under 8), and have received an error twice in row on trying to burn with DVD Studio Pro. There is no more thab 35 minutes of video, am menu, and 16 JPEGS in a slideshow. Here is the log:

Generating Transition: VTSM #01, VOB #1...
Generating Transition: VTSM #01, VOB #2...
Generating Transition: VTSM #01, VOB #3...
Generating Transition: VTSM #01, VOB #4...
Generating Transition: VTSM #01, VOB #5...
Writing VIDEO_TS.VOB
Compiling Menu PGCs...
Writing VTS 020.VOB
Compiling Menu PGCs...
Writing VTS 030.VOB
Compiling Menu PGCs...
Writing VTS 040.VOB
Compiling Menu PGCs...
Writing VTS 050.VOB
Compiling Menu PGCs...
Writing VTS 060.VOB
6 VTSs and 6 Titles will be created...
Compiling VTS#1 (DCNWR 7 0606 copy copy-Current Cut 6_28-MPEG-2 60min High Quality Encode)...
Muxing VTS 011.VOB
Video File Read Error

Build cancelled
Formatting finished.

I appreciate any suggestions or help.