Q: Compressor 3.5: "QuickTime Error - 50," "QuickTime Error - 70"

I have some captured HDV footage placed in a FCP 7 Timeline. When I attempt to transcode this footage into a single video file using Compressor 3.5, the transcode fails and I initially got a "QuickTime Error - 70," and then a "QuickTime Error - 50."  Any suggestions?

I have been attempting to transcode to a full 1920 x 1080; is the native 1440 x 1080 more reasonable with fussy files?  I have 14 tapes total, with all but two prepared successfully to 1920 x 1080 files.