How To Fix CNV_MBT392 - RFC failure. Please check connections.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 392

• Message text: RFC failure. Please check connections.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT392 - RFC failure. Please check connections. ?

  The SAP error message CNV_MBT392 RFC failure. Please check connections typically indicates an issue with the Remote Function Call (RFC) connection between systems in an SAP landscape. This error can occur during data migration or when executing certain functions that require communication between different SAP systems or between an SAP system and an external system.
  Causes:
  
  Network Issues: There may be network connectivity problems between the systems involved.
  RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  System Availability: The target system may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the required ports for RFC communication.
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the systems can communicate over the network.
  Ensure that there are no network outages or issues.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination that is causing the issue.
  Test the connection using the "Test Connection" button to see if it is successful.
  
  
  
  Check User Authorizations:
  
  Ensure that the user ID used for the RFC connection has the necessary authorizations to perform the required actions.
  Check the roles and profiles assigned to the user.
  
  
  
  System Availability:
  
  Ensure that the target system is up and running.
  Check the system logs for any errors that might indicate why the system is not reachable.
  
  
  
  Firewall Configuration:
  
  Verify that the firewall settings allow traffic on the required ports for RFC communication (typically port 3200 for SAP systems).
  Consult with your network/security team if necessary.
  
  
  
  SAP Gateway Configuration:
  
  Ensure that the SAP Gateway service is running on both the source and target systems.
  Check the gateway logs for any errors that might indicate issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage and test RFC destinations.
  SMGW: To monitor the SAP Gateway.
  SICF: To check and manage HTTP services if applicable.
  
  
  
  Logs and Traces:
  
  Check the system logs (transaction SM21) for any related error messages.
  Use transaction ST22 to check for dumps that might provide more context.
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address specific issues related to RFC failures.
  
  
  If the problem persists after checking these areas, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.