I got the exact same error message when I tried backing up my recently purchased copy of “Pride and Prejudice” using the latest version of AnyDVD, v. 6.1.3.0. I tried cleaning the DVD and using “AnyDVD Ripper,” but to no avail.
I finally got fed up trying to backup the DVD and instead decided to actually watch the DVD. I discovered that my store-bought DVD was defective. It would only play half way before the picture became garbled and distorted and then stop playing. I took the defective DVD back to BestBuy and exchanged it. The new DVD backed up beautifully.