SAP Knowledge Base Article - Preview

2548392 - 401:Unauthorized error when connecting HCI to backend system


  • You have a connection between SAP Cloud Platform Integration (former HCI) to an ABAP / backend system through SAP Cloud Connector (SCC).
  • Authentication in the backend is done using client certificate.
  • HCI log shows the following error:

org.apache.cxf.interceptor.Fault: Could not send Message., cause: org.apache.cxf.transport.http.HTTPException: HTTP response '401: Unauthorized' when communicating with [backend URL]



  • SAP Cloud Platform Integration
  • SAP Cloud Connector
  • SAP NetWeaver Application Server ABAP


SAP Cloud Platform Connectivity all versions


Hana Cloud Integration, CPI , KBA , LOD-HCI-PI-RT , Integration Runtime , BC-SEC , Security , BC-CST-IC , Internet Communication Manager , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , Problem

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