How To Fix /LTB/TR_BAS021 - RFC failure occurred

SAP Error Message - Details

• Message type: E = Error

• Message class: /LTB/TR_BAS -

• Message number: 021

• Message text: RFC failure occurred

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /LTB/TR_BAS021 - RFC failure occurred ?

  The SAP error message /LTB/TR_BAS021 RFC failure occurred typically indicates that there is a problem with the Remote Function Call (RFC) communication between systems. This error can arise in various scenarios, such as when trying to execute a function module or when there is an issue with the connection to an external system.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP systems involved.
  RFC Destination Configuration: The RFC destination may not be configured correctly or may be inactive.
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations.
  System Availability: The target system may be down or not reachable.
  Timeouts: The RFC call may be timing out due to long processing times or heavy load on the system.
  Incorrect Function Module: The function module being called may not exist or may have been changed.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the systems. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination being used. Ensure it is active and correctly configured.
  Test the connection using the "Test Connection" button.
  
  
  Review Authorizations: Ensure that the user ID used for the RFC call has the necessary authorizations to execute the function module.
  Check System Status: Verify that the target system is up and running. You can check the system status in transaction SM51 or SM66.
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  Function Module Verification: Ensure that the function module being called exists and is correctly implemented. You can check this in transaction SE37.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SM37: Job Monitoring
  
  
  Logs and Traces: Check the system logs and traces for more detailed error messages that can provide additional context.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to the error message.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.