How To Fix /IWNGW/CM_BEP_RT016 - RFC Error: communication failure

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_BEP_RT -

• Message number: 016

• Message text: RFC Error: communication failure

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWNGW/CM_BEP_RT016 - RFC Error: communication failure ?

  The SAP error message /IWNGW/CM_BEP_RT016 RFC Error: communication failure typically indicates a problem with the communication between the SAP system and an external system or service, often related to the SAP Gateway or the Backend system. This error can arise due to various reasons, including network issues, configuration problems, or service unavailability.
  Causes:
  
  Network Issues: There may be a network connectivity problem between the SAP system and the external system.
  Service Unavailability: The external service or system may be down or not reachable.
  Configuration Errors: Incorrect configuration settings in the SAP Gateway or Backend system can lead to communication failures.
  Firewall Restrictions: Firewalls may be blocking the communication between the systems.
  Timeouts: The request may be timing out due to long processing times or heavy load on the server.
  Incorrect RFC Destination: The RFC destination may not be correctly configured or may point to the wrong system.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the SAP system and the external system is stable and functioning. You can use tools like ping or traceroute to diagnose connectivity issues.
  Verify Service Availability: Check if the external service is up and running. You may need to contact the service provider or check the service logs.
  Review Configuration Settings: Ensure that the RFC destination is correctly configured in transaction SM59. Check the connection parameters, such as the target host, system number, and client.
  Check Firewall Settings: Ensure that firewalls are not blocking the required ports for communication. You may need to work with your network team to verify this.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  Check SAP Gateway Logs: Review the SAP Gateway logs (transaction SMGW) for any additional error messages or clues that can help diagnose the issue.
  Test RFC Connection: Use the Test Connection feature in transaction SM59 to verify that the RFC destination can be reached successfully.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59 - RFC Destinations
  SMGW - SAP Gateway Monitor
  SICF - HTTP Service Hierarchy
  
  
  Logs: Check the application logs (transaction SLG1) for any related error messages that may provide more context.
  SAP Support: If the issue persists, consider reaching out to SAP Support for further assistance, providing them with detailed logs and error messages.
  
  By following these steps, you should be able to identify and resolve the communication failure indicated by the error message /IWNGW/CM_BEP_RT016.