I am trying to make a nandroid backup of my current rom and kernal. While trying to select advanced nandroid backup, I selected one of the options to restore. I used the power button to get out of the restore. Now when I rename the backup, select all to backup and then backup, it gives me Error: Nandroid exited with status 31. What does this mean and how do I fix it? I still have a backup of my original setup before rooting, should I try to restore this?