2616341 - "UCON RFC Rejected" message is returned | SAP Knowledge Base Article

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2616341 - "UCON RFC Rejected" message is returned


The message "UCON RFC Rejected; Called Function :<name of ABAP function that was called>..." is observed at a (client) system that is trying to execute that function module at an SAP NetWeaver ABAP based (server) system.

Such calling system can be another SAP ABAP system, an SAP Java system, the SAP upgrade tool "SUM", or a third party system using one of the SAP libraries (RFC SDK, JCO or NCO).



  • Product / Release independent
  • Middleware / Unified Connectivity tooling


SAP NetWeaver all versions


UPGRADE_GET_ABAPPARAM, SUM, Upgrade, UCONCOCKPIT , KBA , BC-MID-UCO , Unified connectivity tooling , BC-CST-GW , Gateway/CPIC , BC-MID-RFC , RFC , BC-SEC-SNC , Secure Network Communications , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem

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