How To Fix FKK_CRM028 - System error calling RFC module &1 with destination &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FKK_CRM - Messages for FI-CA CRM Integration

• Message number: 028

• Message text: System error calling RFC module &1 with destination &2

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FKK_CRM028 - System error calling RFC module &1 with destination &2 ?

  The SAP error message FKK_CRM028 indicates a system error that occurs when the system attempts to call a Remote Function Call (RFC) module but encounters an issue. This error typically arises in the context of SAP Convergent Charging or SAP Contract Accounts Receivable and Payable (FI-CA) when there is a problem with the RFC destination or the function module being called.
  Causes:
  
  RFC Destination Issues: The specified RFC destination (&2) may not be correctly configured, inactive, or not reachable.
  Authorization Problems: The user or system may lack the necessary authorizations to execute the RFC function module (&1).
  Network Issues: There may be network connectivity problems between the systems involved.
  Function Module Errors: The function module being called may have issues, such as being incorrectly implemented or having bugs.
  System Configuration: There may be configuration issues in the SAP system that prevent the RFC call from being executed properly.
  
  Solutions:
  
  
  Check RFC Destination:
  
  Go to transaction SM59 and verify the configuration of the RFC destination (&2).
  Test the connection to ensure it is active and reachable.
  
  
  
  Review Authorizations:
  
  Ensure that the user executing the transaction has the necessary authorizations to call the RFC function module (&1).
  Check the roles and profiles assigned to the user.
  
  
  
  Network Connectivity:
  
  Verify network connectivity between the systems involved. Check firewalls, VPNs, or any network configurations that might block the connection.
  
  
  
  Function Module Debugging:
  
  If you have access, debug the function module to identify any issues or exceptions that may be occurring during its execution.
  
  
  
  System Logs:
  
  Check the system logs (transaction SM21) for any additional error messages or warnings that could provide more context about the issue.
  
  
  
  SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that may address known issues related to the error message FKK_CRM028.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: 
  
  SM59: RFC Destinations
  SM21: System Log
  SE37: Function Module
  
  
  Documentation: Review the documentation for the specific function module being called to understand its requirements and dependencies.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the FKK_CRM028 error effectively.