INZU666I THE PARTITION part_number BACKUP IMAGE TAKEN AT timestamp (SESSION #session_number) MIGHT BE FOUND IN THE REPLACEMENT DIRECTORY 'dirname'.
Explanation
This message is displayed when the OVERRIDE clause is specified, and the --list-backups option is used in the command line. It gives the information that, if the backup concerned is not at its original location any more, it might be found in the alternate location mentioned, which is specified in the OVERRIDE clause.