I've never received this before - I have had no other problems. What does this mean? I am trying to copy Tomb Raider using DVD Shrink and DVD Decryter.
That normally means that the region code on the disc is different from your player's region code. When Shrink finds a disc with RPC protection, it usually will ask you if you want to make the disc region free. Did you get that message? Make sure you go into Edit > Preferences/ File I/O and see that the RPC2 box is checked. Third from the top.