Solution : https://service.sap.com/sap/support/notes/527047 (SAP Service marketplace login required)
Key words : 
20 windows 2000 unix sapinst simplified chinese china traditional chinese taiwan japanese japan korean korea thai thailand unicode reason, install/codepage/appl_server install/codepage/db/transp install/codepage/db/non_transp database/os upgrade problemsproblems, code page conversion failed rc=2to solve, individual install phasepost installation procedure [important, asian language versions installation include unicode, individual upgrade phase eu_import2the error, phase post upgrade procedure [important, important general information ----------------------------------------------------------------asian language cdplease, upgrade wrong start menu entries, db2/udb windows customers
Related Notes : 
       
| 706712 | CRM Components on Localized Asian Windows Platform | 
| 587776 | SAP KW 6.0 information for Asian language versions | 
| 544623 | New Installation of Unicode SAP systems | 
| 530576 | 6.20 kernel patch level <173: IMPORT FROM DATABASE critical | 
| 527548 | Wrong StartMenu entries on double byte platforms | 
| 527033 | SAP Web AS 6.20 information for Asia | 
| 496251 | INST: SAP Web AS 6.20 on Windows - General | 
| 492208 | INST: SAP Web AS 6.20 Installation on UNIX | 
| 484876 | Additional information about upgrading to SAP Web AS 6.20 | 
| 482462 | Current note on the language transport in Release 6.20 | 
| 80727 | Transporting non-LATIN-1 texts | 
| 54059 | Korean Installation Guide | 
| 47036 | Chinese (Main land China) R/3 System | 
| 45463 | Thai installation procedure | 
| 42305 | RSCPINST (I18N configuration tool) | 
| 19466 | Downloading SAP kernel patches |