Oracle Error Message
RMAN-05026: WARNING: presuming following set of tablespaces applies to specified point-in-time
Reason for the Error
RMAN assumes that the current set of tablespaces with undo segments is the same set that was in use at the specified Point-in-Time. If the set of tablespaces with undo segments changes, the recovery fails. If recovery fails, use the optional UNDO TABLESPACE clause of the RECOVER command to specify the correct set of tablespaces.
Solution
RMAN assumes that the current set of tablespaces with undo segments is the same set that was in use at the specified Point-in-Time. If the set of tablespaces with undo segments changes, the recovery fails. If recovery fails, use the optional UNDO TABLESPACE clause of the RECOVER command to specify the correct set of tablespaces.