How To Fix E1431 - qRFC communication with an external system

SAP Error Message - Details

• Message type: E = Error

• Message class: E1 - Messages for IDoc Basis

• Message number: 431

• Message text: qRFC communication with an external system

What causes this issue?

The chosen port uses the TCP/IP destination &v1&.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

IDoc communication using qRFC for outbound IDocs can only guarantee that
the IDocs are sent in the order in which they were created (Exactly Once
in Order). The external system is responsible for the further processing
sequence.

How to fix this error?

Note the additional processing options in <DS><DS:TRAN.WE21>port
maintenance</></>, where you can specify which function module passes
the data when using qRFC.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E1431 - qRFC communication with an external system ?

  The SAP error message E1431 indicates an issue with qRFC (queued Remote Function Call) communication with an external system. This error typically arises when there are problems in the communication setup or when the external system is not responding as expected.
  Causes of E1431 Error
  
  Network Issues: There may be network connectivity problems between the SAP system and the external system.
  Configuration Errors: Incorrect configuration settings in the RFC destination or qRFC settings can lead to this error.
  External System Down: The external system may be down or not reachable at the time of the call.
  Authorization Issues: The user or service account used for the qRFC call may not have the necessary authorizations.
  Queue Management Issues: Problems with the qRFC queue itself, such as being stuck or not processing messages correctly.
  
  Solutions
  
  
  Check Network Connectivity:
  
  Ensure that the SAP system can reach the external system. You can use tools like ping or telnet to test connectivity.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 and check the configuration of the RFC destination used for the qRFC call. Ensure that it is correctly set up and test the connection.
  
  
  
  Check External System Status:
  
  Verify that the external system is up and running. If it is down, you will need to wait until it is back online.
  
  
  
  Review Authorizations:
  
  Ensure that the user or service account used for the qRFC communication has the necessary authorizations to perform the required actions.
  
  
  
  Monitor qRFC Queues:
  
  Use transaction SMQ1 (for outbound queues) and SMQ2 (for inbound queues) to monitor the status of the queues. Check for any stuck or failed messages and take appropriate action to resolve them.
  
  
  
  Check Logs:
  
  Review the application logs (transaction SLG1) for any additional error messages or details that can provide more context about the issue.
  
  
  
  Reconfigure or Restart:
  
  If the issue persists, consider reconfiguring the RFC destination or restarting the relevant services on both the SAP and external systems.
  
  
  
  Related Information
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to qRFC communication.
  Documentation: Review the official SAP documentation for qRFC and RFC communication for best practices and troubleshooting steps.
  Support: If the issue cannot be resolved internally, consider reaching out to SAP support for assistance.
  
  By following these steps, you should be able to diagnose and resolve the E1431 error related to qRFC communication with an external system.