how do I overcome this error message?
Are you trying to rip/backup with Shrink? Or already ripped and you need compression?
Use the newer always updated DVDFab instead …
And if already on HDD, then using this tool before Shrink , may help…
Edit: cholla beat me to the FixVTS suggestion…However while the FixVTS may help, using a newer backup app,will increase the chances of a proper DVD structure in the first place…
It means Shrink doesn’t like the DVD file structure because something is wrong with it.
Try FixVTS on the files.
It’s in the middle of this somewhere. Posts #67 to #74, but please also read Posts #77 & #78.