dvd2oneX error "Vobset 0 could not be opened"

[tzippy]

okay, i used dvdBackup to copy the whole "lord of the rings - the two towers" bonus disc to my HDD. then i used dvd2oneX, selected the video_ts folder dvdbackup has created, selected "complete copy" (using the german version), selected both audiotracks, set the size to 4444MB and pressed "start".
then i get the error message " Vobset 0 in Directory "/Users/Me/Movies/lotr2d2/VIDEO_TS/" could not be opened.
and another message saying "for a complete copy all files have to be copied in filemode" (again i tanslated from german as i dont know the corresponding english text) and again 2 messages with "vobset 0 in..."

what am i doing wrong? its the first time i make a complete copy as i want to keep the menu structure.
any help?
thx!

[galactica]

any problems when backing up the disk?!
usually this error comes when there was a problem with the backing up process.
you can also try another ripping app if you like see if the same error occurs then as well

[tzippy]

yeah i guess he had some decryption errors when backing up the disc. maybe ill try another ripper... thanks

[WiseWeasel]

Yes, give OSEx a try in DVD Image mode, and see if that solves the problem.

[galactica]

any decryption problems during backup will result in a video_ts folder that is not up to par, as you now see. try OSeX after you play the disk for a good bit and see if that doesnt do any better