Solution : https://service.sap.com/sap/support/notes/800096 (SAP Service marketplace login required)
Key words : 
br121e processing log file /oracle/prd/sapbackup/bdopnedz, /oracle/prd/sapbackup/bdopnedz, br0202i saving /oracle/backup/archivebr0203i, archive  test/5this results, br123e format error found, /dev/rmt/0mn, terms br tools, 2-phase backup - backup, location brblogread-42#dir, program error
Related Notes : 
       
| 680046 | Corrections in BR*Tools Version 6.40 | 
| 514205 | Corrections in BR*Tools version 6.20 |