CD image smaller than bbmpeg_muxed_file0x

What causes bad packets? 

OK - I have had some success troubleshooting this thing. The 'bad packets' error from VCDEasy was the ticket. I took the last bbmpeg_muxed_file of the set (the one with the bad packets) and ran it in 'Simple Multiplex' in the TMPGEnc mpeg tools. I put the new file in place of the old one in my DVD2SVCD project folder and recovered from the SVCD authoring stage. In addition to getting the whole movie file in the last image, all the chapters were correct as well. So any idea what caused my bad packets in the original bbmpeg or would it have been corrupted even further back - say in the encoding? Thanks.

Not just with DVD source 

Well, I hope that this isn't such a newbie thing that I am being ignored, but I thought that I would update my latest findings for the next chap down the line. A forum search yields very little about this. I have done three more films since my last post, only this time the source was AVI rather than DVD/VOB. On the latest project the last image file was only about half the size of the last muxed mpeg file. The same TMPEG trick worked to repair the file and all is well. I still don't know what causes this. Anyone know? ***edit - it would seem that this problem is not exclusive to the last file of a CD set. I just had a similar error with the first file of a 3 disk set. The only difference this time was addition of an "access violation error". A forum search did turn up some information about this, but not really in the context I am describing. In any case, once I repaired the first file, I burned the imaged without a problem. Weird . . .***