How To Fix GS856 - No RFC connection maintained for updating the set buffer

SAP Error Message - Details

• Message type: E = Error

• Message class: GS - Sets

• Message number: 856

• Message text: No RFC connection maintained for updating the set buffer

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message GS856 - No RFC connection maintained for updating the set buffer ?

  The SAP error message GS856, which states "No RFC connection maintained for updating the set buffer," typically occurs in the context of Remote Function Call (RFC) connections in SAP systems. This error indicates that the system is unable to maintain a connection to update the set buffer, which is often related to issues with the configuration of RFC connections or the underlying network.
  Causes:
  
  RFC Connection Issues: The RFC connection to the target system may not be properly configured or may be down.
  Network Problems: There could be network issues preventing the SAP system from reaching the target system.
  Authorization Issues: The user may not have the necessary authorizations to establish an RFC connection.
  System Configuration: The system may not be configured to allow updates to the set buffer.
  Buffer Issues: The buffer itself may be corrupted or not properly initialized.
  
  Solutions:
  
  
  Check RFC Connection:
  
  Go to transaction SM59 and verify the configuration of the RFC destination. Ensure that the connection is correctly set up and test the connection to see if it is working.
  
  
  
  Network Connectivity:
  
  Ensure that there are no network issues between the systems. You can use tools like ping or traceroute to check connectivity.
  
  
  
  Authorization Check:
  
  Verify that the user has the necessary authorizations to perform the operation that requires the RFC connection. Check roles and profiles assigned to the user.
  
  
  
  System Configuration:
  
  Review the system settings related to the set buffer and ensure that they are correctly configured. This may involve checking parameters in transaction RZ10 or RZ11.
  
  
  
  Buffer Management:
  
  If the buffer is suspected to be corrupted, consider clearing or refreshing the buffer. This can sometimes resolve issues related to stale or corrupted data.
  
  
  
  Check Logs:
  
  Review the system logs (transaction SM21) and the developer trace (transaction ST11) for any additional error messages or warnings that could provide more context about the issue.
  
  
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation regarding RFC connections and buffer management for more detailed information on configuration and troubleshooting.
  Community Forums: Consider searching or posting on SAP community forums or platforms like SAP Community, Stack Overflow, or other SAP-related discussion boards for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the GS856 error in your SAP system.