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3313319 - CTE - Concur connection is failing with 400 and 404 errors (NIECONN_REFUSED)


The Concur connection is not working, checking the connection at CTE_SETUP > System > Check connection is possible to see 400/404 error with NIECONN_REFUSED or NIEHOST_UNKNOWN mentioned in detailed message.

The below error may vary:

400  Error >>> Ping
No data can be received from HTTP client http_communication_failure.
No response from Concur system. Try again later.
404 Connection Refused
Connect to failed: NIECONN_REFUSED(-10)



  • SAP S/4 Hana
  • Concur Expense
  • SAP ERP Integration with Concur Solutions
  • SAP S/4 Hana Integration with Concur Solutions


Concur Expense all versions ; SAP ERP all versions ; SAP ERP integration with SAP Concur solutions all versions ; SAP S/4HANA all versions ; SAP S/4HANA integration with SAP Concur solutions all versions


NIECONN_REFUSED, Concur integration, Concur connection, NIEHOST_UNKNOWN, icxxconn.c , KBA , BNS-CON-SE-S4 , Concur Suite Enablement S/4HANA Integration , BNS-CON-SE-ERP , Concur ERP Integration , Problem

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