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

Cause: An attempt was made to specify duplexing to sequential devices, but the BACKUP_TAPE_IO_SLAVES initialization parameter was not enabled

Action: Specify BACKUP_TAPE_IO_SLAVES=TRUE in the INIT.ORA file, or do not specify duplexing to sequential devices

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