Solution : https://service.sap.com/sap/support/notes/664475 (SAP Service marketplace login required)
Key words : 
upgradei/ important general remarks------------------------< d027190 27/10/04 >-------------------------, / important general remarksii/ errors, cd-romiv/ actions, individual phasesvii/ actions, sap note refers, upgrade documentationiii/ errors, iseries-specific problems, general notes 661569, ii/ errors, upgrade documentation
Related Notes : 
       
| 775047 | Add. info. on upgrading to SAP Web AS 6.40 SR1 | 
| 661640 | Add. info. on upgrading to SAP Web AS 6.40 | 
| 661569 | Additional Information: Upgrade to SAP Web AS 6.40: iSeries | 
| 658992 | Additional information for the upgrade to BW 3.50 |