How To Fix ISU_S4H_C4C_UTIL_MSG204 - Port &1 of type &2 already exists for another RFC destination

SAP Error Message - Details

• Message type: E = Error

• Message class: ISU_S4H_C4C_UTIL_MSG -

• Message number: 204

• Message text: Port &1 of type &2 already exists for another RFC destination

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ISU_S4H_C4C_UTIL_MSG204 - Port &1 of type &2 already exists for another RFC destination ?

  The SAP error message ISU_S4H_C4C_UTIL_MSG204 indicates that there is a conflict with the configuration of RFC (Remote Function Call) destinations in your SAP system. Specifically, it means that a port of a certain type already exists for another RFC destination, which is causing a conflict.
  Cause:
  This error typically arises due to one of the following reasons:
  
  Duplicate RFC Destination: There is an attempt to create or configure an RFC destination with a port that is already in use by another destination.
  Configuration Error: There may be a misconfiguration in the settings of the RFC destinations, leading to the same port being assigned to multiple destinations.
  Transport Issues: If you are transporting configurations between systems, it is possible that the same RFC destination was included in the transport, leading to conflicts.
  
  Solution:
  To resolve this issue, you can follow these steps:
  
  
  Check Existing RFC Destinations:
  
  Go to transaction code SM59 (RFC Destinations).
  Look for the RFC destination that is causing the conflict and check its configuration.
  Identify if the port number is already assigned to another RFC destination.
  
  
  
  Modify or Delete Conflicting RFC Destination:
  
  If you find that the port is indeed in use, you can either:
  
  Change the port number of the conflicting RFC destination to a different one.
  Delete the unnecessary or duplicate RFC destination if it is not needed.
  
  
  
  
  
  Review Transport Requests:
  
  If the issue arose after a transport, check the transport request to ensure that it does not contain duplicate entries for RFC destinations.
  Adjust the transport request as necessary.
  
  
  
  Check for System-Specific Configurations:
  
  Ensure that the configurations are consistent across different systems (e.g., Development, Quality Assurance, Production) to avoid conflicts.
  
  
  
  Restart Services:
  
  After making changes, it may be necessary to restart the relevant services or the SAP system to ensure that the changes take effect.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SE11: Data Dictionary (to check related tables)
  SE37: Function Module (to check the function modules related to RFC)
  
  
  
  Documentation: Refer to SAP Help documentation for detailed information on RFC configuration and troubleshooting.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  
  
  By following these steps, you should be able to resolve the conflict indicated by the error message ISU_S4H_C4C_UTIL_MSG204. If the issue persists, consider reaching out to SAP support for further assistance.