Solution : https://service.sap.com/sap/support/notes/300105 (SAP Service marketplace login required)
Key words : 
/3              51010778           bw / sem         51010609           b2b / crm        51010779do, /400 news hot news reason, relevant ibm info apar, important problem fixes information, ibm info apar, latest news                            ii, reverse chronological order, 6c kernel rel, 6c kernel shipped, severe performance problems
Related Notes : 
       
| 390665 | Additional information: Upgrade to 4.6C SR 2 (DB2/400) | 
| 300097 | INST: 4.6C R/3 Installation on IBM AS/400 | 
| 202169 | Additional Info: Upgrade to 4.6C - DB2/400 | 
| 83303 |