ORA-19565:BACKUP_TAPE_IO_SLAVES not enabled

ORA-19565: BACKUP_TAPE_IO_SLAVES not enabled when duplexing to sequential devices

Reason:

You are attempting to generate more than one copy for your backup.

Action:

Enable the BACKUP_TAPE_IO_SLAVES option in either your init<sid>.ora or SPFILE file when generating more than once copy of your backup.