SAP Knowledge Base Article - Preview

1939124 - "Connection closed (no data)" error during connection test to an external program


  • In the external RFC trace with the file name format rfc<pid>_<tid>.trc there is the error message "Error ab_RfcSetHeader> invalid compression value 5 received".
  • The header of the external RFC trace shows that the RFC library used by the external program is non-unicode. "RFC-VER nU".



  • SAP Basis Release indenpendent.
  • Unicode ABAP system, non-unicode RFC library on the external (non-ABAP) side


TCP/IP destination connection closed , KBA , BC-MID-RFC-SDK , NetWeaver RFC SDK , Problem

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