How To Fix DU209 - Error occurred during communication with &

SAP Error Message - Details

• Message type: E = Error

• Message class: DU - Data transfer to SAP-EIS

• Message number: 209

• Message text: Error occurred during communication with &

What causes this issue?

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

System Response

Communicaton was terminated.

How to fix this error?

Check RFC destination &v1&, the system log and the dump analysis for
&v1& and the system log for the gateway.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DU209 - Error occurred during communication with & ?

  The SAP error message DU209, which states "Error occurred during communication with &," typically indicates a communication issue between the SAP system and an external system or service. This could involve various components such as middleware, external databases, or other SAP systems.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the external system.
  Configuration Errors: Incorrect configuration settings in the RFC (Remote Function Call) destination or in the communication parameters.
  Authorization Issues: The user or service account may not have the necessary permissions to access the external system.
  Service Availability: The external service or system may be down or not responding.
  Firewall Restrictions: Firewalls may be blocking the communication ports required for the connection.
  Protocol Mismatch: There may be a mismatch in the communication protocols being used.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the SAP system and the external system is stable and operational. You can use tools like ping or traceroute to diagnose connectivity issues.
  Review RFC Configuration: Go to transaction SM59 in SAP and check the configuration of the RFC destination. Ensure that the settings (like target host, system number, client, etc.) are correct.
  Check Authorizations: Verify that the user or service account has the necessary authorizations to perform the required actions on the external system.
  Monitor External System: Check the status of the external system or service to ensure it is up and running. Look for any logs or error messages that might indicate issues.
  Firewall Settings: Review firewall settings to ensure that the necessary ports for communication are open and not being blocked.
  Protocol Configuration: Ensure that both systems are using compatible communication protocols (e.g., HTTP, HTTPS, RFC).
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM59: For managing RFC destinations.
  SM21: For checking system logs for errors.
  ST22: For analyzing dumps that may provide more context on the error.
  SLG1: For application log analysis.
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message DU209. You can search for relevant notes in the SAP Support Portal.
  
  
  Documentation: Review the SAP documentation for the specific components involved in the communication to ensure that all configurations are set up correctly.
  
  
  If the issue persists after checking these areas, it may be beneficial to engage with your SAP Basis team or SAP support for further assistance.