Solution : https://service.sap.com/sap/support/notes/1009332 (SAP Service marketplace login required)
Key words : 
issues limitations hints message box appears, symptom sap netweaver 2004s rapid installer, sap netweaver 2004s rapid installer, oss component bc-ins, rapid installer reason, netweaver 2004s, central entry point, rapid configuration task, sap system id, sap system id -
Related Notes : 
       
| 1072190 | Component EP-RA will be deactivated | 
| 1061939 | SAP ERP Enhan. Pk.1 SPS 03(07/2007) Release Information Note | 
| 1050460 | Automatic roles, information about activation | 
| 1046866 | SAP ERP Enhan. Pk.1 SPS 02(05/2007) Release Information Note | 
| 1034262 | SAP ERP Enhan. Pk.1 SPS 01(03/2007) Release Information Note | 
| 1017324 | EP on Oracle: Poor portal performance | 
| 1014691 | SAP ERP 2005 SP Stack 8 (03/2007) Release Information Note | 
| 1000291 | Automatic Roles | 
| 874049 | Termination caused by incorrect mount point | 
| 830576 | Parameter recommendations for Oracle 10g |