On Mon, Nov 24, 2008 at 7:14 AM, Nagaraj S <nagaraj.chk@xxxxxxxxx> wrote: > > As part of it, I have unregistered the production database on rman catalog > on server A and I have changed my database DBID using NID tool in server B > and registered with new DBID to the catalog database. We had a problem > today...client asked us to restore October month backup from tape when I try > to do restore I get the following error > You have probably already come to this conclusion, but it bears repeating: Do not de-register old production databases from the rman catalog. There's probably very few reasons for doing so, and you have discovered a very good reason for not de-registering old databases. Jared