Imgtool error

[shirls]

trying to make a back up of a dvd and I keep getting an error when I try to create the image file using imgtool

error reads can't locate video_ts folder or video ts.ifo file please re-enter

I am using dvd decrypter to rip the disk and ifoedit to split into two disks. After splitting into two disks I choose the region free option, removed user prohibitions, remove P-ups and then did my final sector adjustments. Then when I go to create my image using imgtool I choose the settings where the files reside on the HD make the virtual drive then I get the error.

I have followed the guide as indicated on the doom9 link and can't seem to solve the problem.


CPU - 850 mhz Pentium
384 mb Ram
Memorex DVD +R/+RW CD R/RW
Media - Memorex