Solution : https://service.sap.com/sap/support/notes/90323 (SAP Service marketplace login required)
Key words :
RFC, logon screen, logon, CALL_FUNCTION_SIGNON_REJECTED, CALL_FUNCTION_SYSCALL_ONLY, high availability
Related Notes :
| 1491645 | Unauthenticated system access via RFC or HTTP |
| 1405158 | DbSlControl(DBSL_CMD_DBNAME_GET): RFC-'Fingerprint' |
| 1404550 | IBM i: Display of RFC logon screen in transaction SM51 |
| 952349 | |
| 662895 | Remote login using SM51 fails |
| 374276 | Single database, multiple schemata |
| 91980 | Missing output of RFC short dump after login error |
| 77833 | PXA_NO_FREE_SPACE, buffer size 4MByte |
| 51367 | RFC logon under different user or client |
| 25721 | RFC logon Screen |
| 19466 | Downloading SAP kernel patches |