How To Fix D3047 - RFC: Unknown error or illegal parameter

SAP Error Message - Details

• Message type: E = Error

• Message class: D3 - CCMS - DB2 on OS390

• Message number: 047

• Message text: RFC: Unknown error or illegal parameter

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message D3047 - RFC: Unknown error or illegal parameter ?

  The SAP error message D3047, which states "RFC: Unknown error or illegal parameter," typically indicates that there is an issue with the Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. This error can arise from various causes, and here are some common reasons, potential solutions, and related information:
  Causes:
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system.
  Network Issues: There may be network connectivity problems between the systems involved in the RFC call.
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations.
  Parameter Mismatch: The parameters being passed in the RFC call may not match the expected parameters in the function module.
  Version Incompatibility: There may be a version mismatch between the systems involved in the RFC communication.
  System Load or Performance Issues: High load on the SAP system can lead to timeouts or other unexpected behavior.
  
  Solutions:
  
  
  Check RFC Destination:
  
  Go to transaction SM59 and verify the configuration of the RFC destination. Ensure that the connection parameters (like target host, system number, client, user, and password) are correct.
  Test the connection from SM59 to ensure it is working properly.
  
  
  
  Review Function Module:
  
  Check the function module being called to ensure that the parameters being passed are correct and in the expected format.
  Use transaction SE37 to review the function module and its parameters.
  
  
  
  Check Authorizations:
  
  Ensure that the user used for the RFC call has the necessary authorizations to execute the function module.
  
  
  
  Network Troubleshooting:
  
  Verify network connectivity between the systems. Use tools like ping or traceroute to check for any network issues.
  Check firewall settings that may be blocking the RFC communication.
  
  
  
  Review System Logs:
  
  Check the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  
  
  Performance Monitoring:
  
  Monitor system performance and check for any bottlenecks that may be affecting RFC calls. Use transaction ST22 to check for dumps or SM50 to monitor active processes.
  
  
  
  Update SAP Notes:
  
  Check for any relevant SAP Notes that may address known issues related to the error message D3047. You can search for notes in the SAP Support Portal.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on RFC and troubleshooting RFC-related issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue persists and cannot be resolved, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the D3047 error in your SAP environment.