Solution : https://service.sap.com/sap/support/notes/164303 (SAP Service marketplace login required)
Key words : 
windows nt - oracle                  0164308 additional key words 46a installation adabas informix mssql oracle db2, windows nt - ms sql server            0164306r/3 installation, hkey_local_machine\system\currentcontrolset\control\session manager, windows nt - db2/udb                  0164291r/3 installation, execute program <rdbms-cd>\nt\patch\xb, start -> programs -> informix -> <host><sid>tcp, ==========================================================date          topic              short description -------------------------------------------------------------------- contents, <rdbms-cd>\nt\patch, windows nt - adabas, informixserver '<host><sid>tcp'
Related Notes : 
       
| 169781 | R/3 4.6A Installation/Upgrade Japanese |