Solution : https://service.sap.com/sap/support/notes/320631 (SAP Service marketplace login required)
Key words : 
topics                                        date changed======                                        ============1 general information                          08, r3setup command files central, 3-tier systems          ii  release 3, command files centrdb, 1i service release 1, installing 3-tier systems, install 3-tier systems, general information, general information +===================================================================+, /400 3-tier reason
Related Notes : 
       
| 484548 | iSeries: 3 tier system installation |