Solution : https://service.sap.com/sap/support/notes/1650052 (SAP Service marketplace login required)
Key words :
prerequisites encoding problem occurring, symptom unicode characters appearing, portal integration reason, unicode characters, -unicode systems, navigation calls, german umlauts, send corrupted, target applications, terms navigate_object_based
Related Notes :
| 1353538 | NWBC -Patch Collection- SERVER SIDE (ABAP)+NWBC for HTML |