RMAN and recovering data

[reydp]

rman> backup tablespace pbh'

sqlplus sys/"sys as sysdba"

sqlplus > drop tablespace pbh including contents;

rman> restore tablespace pbh;

Starting restore at 10-AUG-06
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=138 devtype=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 08/10/2006 15:01:11
RMAN-20202: tablespace not found in the recovery catalog
RMAN-06019: could not translate tablespace name "PBH"

This message shows that you are connecting RMAN thru target database control file and not thru recovery catalog.
If you use recovery catalog, when you execute your backup,
then use recovery catalog, before executing the restore command.

If you execute your backup command using target database control file, then chances are, those entries have been aged out. And that is why your restore command no longer recognized by RMAN.