Nowhere in my post did I indicate AnyDVD wouldn't work with Nero.
I'm not sure how many use Nero with AnyDVD. I would never use Nero to burn movies. Come to think of it, I don't use Nero for much of anything anymore, I do however still have it installed.
I am going to guess that the movie you are trying to copy has file structure tweaks in place to prevent applications like DVD Shrink (now known as Recode) and DVD Decrypter from working. The AnyDVD ripper utility was added to AD specifically to address these types of errors. Give it a try, it just might work.
It's safe to say the disc itself isn't physically damaged, as it does work with other programs.