Solution : https://service.sap.com/sap/support/notes/663089 (SAP Service marketplace login required)
Key words :
SM59, RFC bit options, "Special options"
Related Notes :
| 1319517 | Unicode Collection Note |
| 920831 | RFC with inactive text language |
| 886571 | RFC non-Unicode ./. Unicode with illegal text language |
| 881781 | Unicode/non-Unicode RFC language and code page assignment |