Hi,
Sometimes You can get “RMAN-06092: error while looking up backup piece ” error.
Details of error are as follows.
RMAN-06092: error while looking up backup piece
Cause: An error occurred while looking up the specified backup piece in the recovery catalog or target database control file.
Action: This error is accompanied by other errors describing the reason for the failure.
Ensure that the name or key is entered correctly. If the backup piece was created when the recovery
catalog was not available, then a RESYNC CATALOG must be done to update the recovery catalog.
RMAN-06004: ORACLE error from recovery catalog database:
RMAN-20260: backup piece not found in the recovery catalog
RMAN-06092: error while looking up backup piece
RMAN-06092: error while looking up backup piece
This error is related with the snapshot controlfile.
To solve this error, remove the snapshot controlfile as follows.
RMAN> DELETE FORCE NOPROMPT OBSOLETE DEVICE TYPE DISK;
If RMAN-06214 still occurs, then try
RMAN> CROSSCHECK COPY OF CONTROLFILE;
Do you want to learn more details about RMAN, then read the following articles.
https://ittutorial.org/rman-backup-restore-and-recovery-tutorials-for-beginners-in-the-oracle-database/