My wife has a MacBook Pro 2.53 GHz Intel Core 2 Duo, with 4 GB 1067 MHz DDR3 and 250 GB Hard drive with a 1.5 TB external. We use Mac the Ripper and the latest version of DVDReMaster v6. We back up our dvds (specifically Disney DVDs for the kids). One day I had to leave the house while Using DVDReMaster and my wife assuming that I was done with the computer and it had burned successful shut the system down, neither of us are very computer savy. Ever since then when I have tried to ReMaster a DVD I get a message that states I have a "Disc Recording Error: DVD Structure is Corrupted can not burn" When this error message first started I thought it had to do something with DVDReMaster and I was running v5 so I upgraded but I still get the same message. I tried ripping new DVDs and burning them, same response, I tried ripping DVDs that I have burned before, same response. I tried burning DVDs that have been ripped and were stored in the computer, same response. I tried opening up the movies folder and dragging the video_ts to DVDReMaster, same response. I tried dragging the whole movie to DVDReMaster, same response. I have been successful in burning CDs and my wife has burned a video recording that she had made with IMovie via IDVD and that was successful. Any and all help will be greatly appreciated. Thanks in advance for your assistance.