How To Fix SIW798 - Error during RFC data transfer

SAP Error Message - Details

• Message type: E = Error

• Message class: SIW - Service Implementation Workbench

• Message number: 798

• Message text: Error during RFC data transfer

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SIW798 - Error during RFC data transfer ?

  The SAP error message SIW798, which indicates "Error during RFC data transfer," typically occurs during Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. This error can arise due to various reasons, and understanding the cause is essential for troubleshooting.
  Possible Causes:
  
  
  Network Issues: Problems with the network connection between the systems can lead to RFC errors. This could include timeouts, disconnections, or network configuration issues.
  
  
  Authorization Issues: The user or service account used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  
  
  Configuration Errors: Incorrect configuration of the RFC destination in transaction SM59 can lead to communication failures. This includes incorrect hostnames, ports, or connection types.
  
  
  System Load: High load on the SAP system can lead to performance issues, causing timeouts or failures in data transfer.
  
  
  Data Issues: If the data being transferred is malformed or exceeds size limits, it can cause the RFC call to fail.
  
  
  Version Compatibility: Incompatibility between different versions of SAP systems can also lead to RFC errors.
  
  
  Solutions:
  
  
  Check Network Connectivity: Ensure that there is a stable network connection between the systems. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Review RFC Destination Configuration: Go to transaction SM59 and check the configuration of the RFC destination. Ensure that the hostname, service, and connection type are correctly set.
  
  
  Check Authorizations: Verify that the user or service account has the necessary authorizations to execute the RFC function. You can check this in transaction SU53 after the error occurs.
  
  
  Monitor System Performance: Use transaction SM37 to check for any long-running jobs or performance issues that might be affecting the system.
  
  
  Review Data Being Transferred: If possible, check the data being sent in the RFC call to ensure it is valid and within acceptable limits.
  
  
  Check SAP Notes: Look for any relevant SAP Notes that might address known issues related to RFC communication. You can search for notes in the SAP Support Portal.
  
  
  Debugging: If you have access, you can debug the RFC function module to identify where the error occurs. This may require technical expertise.
  
  
  Consult Logs: Check the system logs (transaction SM21) and the developer trace files (transaction ST11) for any additional error messages or clues.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SU53: Authorization Check
  SM37: Job Monitoring
  ST22: Dump Analysis
  SM21: System Log
  ST11: Developer Traces
  
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance, providing them with detailed information about the error and the steps you have already taken.
  
  
  By systematically checking these areas, you should be able to identify and resolve the cause of the SIW798 error during RFC data transfer.