Joe, Thanks for your reply. I think the datafile 1 thing is a red herring - everything else points to datafile 13 being the problem. I haven't applied any patches or upgrades, but I wouldn't be at all surprised if you're right about there being a corruption in the datafile header. Regards David Lord On 16/04/2008, TESTAJ3@xxxxxxxxxxxxxx <TESTAJ3@xxxxxxxxxxxxxx> wrote: > > > David, datafile 1 is the system tablespace datafile, I've not seen that > error. > > An off the wall question did the database have a patchset and/or upgrade > done to it since the backup was taken? It almost appears as if the header > in the datafile is either corrupt or did not get converted during an upgrade > process. > > just throwing out some ideas. > > Thanks, Joe > > --------------------------------------- > You can have it: Fast, Right or Cheap, pick 2 of the 3. > Fast + Right is Expensive > Fast + Cheap will be incorrect. > Right + Cheap will take a while. > >