3798560 - Connection to SAP ECC fails with internal server error in SAC

When creating or testing an SAP S/4HANA import data connection in SAP Analytics Cloud to an on-premise SAP ERP (ECC/EHP7) system via SAP Cloud Connector, the connection fails with the following errors:

• Pop-up error in SAC: Unable to connect to the data source. Check the connection details and user credentials, then try again
• Error in the HAR/Network trace: "Authentication failure. 500 Internal Server Error — SAP Gateway was deactivated — Run transaction /IWFND/ERROR_LOG on SAP NW Gateway hub system and search for entries with the timestamp above for more details."
• Running the URL https://<ecc-host>:<port>/sap/opu/odata/IWFND/CATALOGSERVICE;v=2/?sap-client=<client> in the browser returns the same error message.

SAP Analytics Cloud 2026.14.3

SAP Analytics Cloud, SAC, SAP Gateway, SAP NetWeaver Gateway, Gateway deactivated, OData, CATALOGSERVICE, /IWFND/CM_COS/003, ECC, EHP7, SAP ERP, on-premise, Cloud Connector, SCC, SPRO, /IWFND/MAINT_SERVICE, SICF, HTTP 500, import connection, S/4HANA connection type, OData Channel, cluster, failover, Data Channel activation , KBA , LOD-ANA-AQU , Import Data Connections (Acquiring Data) , Problem