I take it you get this error when you try to rip the movie to the hard drive? This error can be caused by several different things, but usually relates to scratches or dirt or smudges on the dvd…something that interferes with the laser reading the information on the disk.
You will sometimes see this from Shrink when it hits a newer protection scheme that is beyond its ability to decrypt. Which is why you need DVDFab HD Decrypter for the decryption/ripping part of the process.
If the disk is too scratched up for DVDFab to read, you need to locate a store that has a polishing machine. Many local rental shops have them and will polish out scratches on your dvds for a small fee.