Solution : https://service.sap.com/sap/support/notes/1274597 (SAP Service marketplace login required)
Key words :
xml output extra selection screen parameter, sap core c-cee add-, xml output codepage conversion utf-8, terms intrastat special characters, xml specificaly interpreted characters, c-cee add-, intrastat output file, language specific characters, invalid xml file, receipt/dispatch - bulgaria
Related Notes :
| 1384240 | Intrastat BG XML - Cyrillic chars not replaced correctly |
| 979864 | Intrastat for Bulgaria |