Solution : https://service.sap.com/sap/support/notes/410783 (SAP Service marketplace login required)
Key words : 
longer maintained, release information, prerequisites
Related Notes : 
       
| 1489787 | Software Update Manager 1.0: IBM DB2 for i | 
| 1168235 | Upgrade to SAP NetWeaver 7.0 EHP1 ABAP (IBM DB2 for i) | 
| 822296 | Additional info: Upgrade to SAP NW 2004s AS ABAP (iSeries) | 
| 664679 | Installing 6.40 kernel in SAP WEB AS 6.10/6.20 | 
| 661569 | Additional Information: Upgrade to SAP Web AS 6.40: iSeries | 
| 500297 | Additional Information: Upgrade to SAP Web AS 6.20: iSeries | 
| 418246 | Release restrictions SAP Web ACE 6.10 | 
| 83292 | Releases and PTFs for R/3 on AS/400 | 
| 19227 | Open newest saposcol |