Answer / guest

Cause: A CHANGE or REPORT command needs to compute the list
of backups that are redundant and may be deleted. If the
mounted controlfile is not current, it may not be possible
to determine if a satisfactory backup exists for files which
have been offline since the last OPEN RESETLOGS.

Action: No action need be taken - this is an informational
message only. To ensure a complete report of obsolete
backups, mount a current controlfile.

Please add more information about this Error

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