Solution : https://service.sap.com/sap/support/notes/390508 (SAP Service marketplace login required)
Key words :
additional key words, handle saphttp, special processor, activate saphttp, saphttpam frontend, sap system, affected user, parameter saphttp_rfc_check_to, destination check, problem completely
Related Notes :
| 423923 | RFC destination SAPHTTP is not created |
| 354464 | Problems with saphttp and sapftp on the frontend |