Solution : https://service.sap.com/sap/support/notes/331008 (SAP Service marketplace login required)
Key words :
symptom missing german umlauts, svrmgrl> connect internalsvrmgrl> select, dev_w developer trace file, -default database code page, nls_characterset we8decnls_language americannls_territory americain, additional key words nls_lang, multi oracle home environment, multi byte languages, earlier database versions, oracle installer correspondingly
Related Notes :
| 381674 | Oracle and NT: NLS_LANG must be set |
| 31559 | NT: Setting environment variables for R/3 kernel |