Solution : https://service.sap.com/sap/support/notes/103533 (SAP Service marketplace login required)
Key words : 
%homedrive%%homepath%\codepage\                - select control panel -> system -> environment                - set, \usr\sap\<sid>\sys\profile\<sid>_dvebmgsxx_<host, starting upgrade  ii/  database/os upgrade problems  iii/  problems, \\usr\sap\<sid>\sys\exe\run, additional key words japan japanese windows nt 4, ii/   database/os upgrade problems, path_to_codepage %homedrive%%homepath%\codepage\                - logoff, \\usr\sap\put\log\act40b, directory %homedrive%%homepath%\codepage\, individual upgrade phase  iv/   problems
Related Notes : 
       
| 158404 | Latest note on language import 4.0B / SR1 | 
| 112029 | Current note about language import 4.5A/BW 1.2B | 
| 108820 | 40B Asian language files | 
| 98129 | Additional Info: Upgrading to 4.0B ADABAS | 
| 97583 | Current note about language import 4.0B | 
| 95999 | Additional Info: Upgrading to 4.0B ORACLE | 
| 94663 | Additional Information: Upgrading to 4.0B INFORMIX | 
| 91709 | Addition upgrade to 4.0B | 
| 79518 | RDDIMPDP terminated abnormally in CON_BAS phase. |