RMAN Point in Time DUPLICATE fails with RMAN-20201 RMAN-06010

I am trying to duplicate a database but it is failing with the following error:

RMAN-03002: failure of set command at 02/22/2012 14:48:56
RMAN-06004: ORACLE error from recovery catalog database: RMAN-20201: datafile not found in the recovery catalog
RMAN-06010: error while looking up datafile: 25

Did some checking in the Metalink but not able to find any solution to my scenario. For example the Metalink Note [ID 1107664.1] refers to a situation where the datafile was created after the date(to which I want to restore the database to]. In my case the datafile was created in 2004 and I am trying to do Pint In time to Feb 17, 2012. I also checked the backup of this file RMAN> list backup of datafile <file#>; It indicates that the datfile was backed up regularly.

This database has 438 datfiles. I hope that shouldn't cause this error.

Please let me know if you any suggestions to resolve this issue and succeed in the RMAN DUPLICATE.

Appreciate your help in advance,
Ashoke

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