I dont think size of file set is the problem , but here's what I've tried; 1) VHS movie captured as mpeg2 file. Movie is 2:10 in length , so vobs etc amount to 11 gigabyte in size. (that was a surprise to me....) I then used VSO's DivXtoDVD app to transcode the mpg to vob,ifo,bup files. 2) I tried DVDShrink , over and over, but I get error message , always the same, that a problem was encountered with "VTS_01_9.vob" 3) I tried work-arounds, like renaming to .mpg , to see if that one file would run...and it DID, just fine!! It ran just that portion of the movie that it pertained to. So what was 'Shrinks problem with same file in .vob format?? 4) I tried substituting another 1gig .vob , renamed to match problem file, and 'Shrink still came up with same error message pointing to vts_01_9.vob. 5) finally , I used the VOB Extras button ( not knowing what it's for) , and found option to "fix" vob structures and navigation . That took a while to do.....but , alas, was no help as far as DVDShrink problem was concerned. I had used the DivXtoDVD app on smaller mpg files and 'Shrink opened them with no error message. Any ideas??