How To Fix SWLT116 - Cannot delete from ATC cache: Enqueue not possible. Check enqueue server

SAP Error Message - Details

• Message type: E = Error

• Message class: SWLT - Message Class for ... guess!

• Message number: 116

• Message text: Cannot delete from ATC cache: Enqueue not possible. Check enqueue server

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWLT116 - Cannot delete from ATC cache: Enqueue not possible. Check enqueue server ?

  The SAP error message SWLT116 indicates that there is an issue with the ATC (ABAP Test Cockpit) cache, specifically that the system is unable to delete from the cache due to an enqueue lock issue. This typically means that the enqueue server is not available or there is a problem with the enqueue mechanism in the SAP system.
  Cause:
  
  Enqueue Server Issues: The enqueue server, which is responsible for managing locks in the SAP system, may be down or not functioning correctly.
  Lock Conflicts: There may be existing locks that are preventing the deletion from the ATC cache.
  System Configuration: Misconfiguration in the SAP system or issues with the transport directory can also lead to this error.
  Network Issues: If the enqueue server is on a different host, network issues could prevent communication.
  
  Solution:
  
  
  Check Enqueue Server Status:
  
  Use transaction SM12 to check for any existing locks that might be causing the issue.
  Use transaction SM51 to check the status of the application servers and ensure that the enqueue server is running.
  
  
  
  Restart Enqueue Server:
  
  If the enqueue server is down, you may need to restart it. This can typically be done through the SAP system administration tools or by restarting the entire SAP instance.
  
  
  
  Check System Logs:
  
  Review the system logs (transaction SM21) for any errors or warnings related to the enqueue server or ATC.
  
  
  
  Clear ATC Cache:
  
  If possible, try to clear the ATC cache manually. This can sometimes resolve issues related to stale cache entries.
  
  
  
  Check Configuration:
  
  Ensure that the configuration for the enqueue server is correct. This includes checking the instance profile and ensuring that the necessary parameters are set correctly.
  
  
  
  Consult SAP Notes:
  
  Look for any relevant SAP Notes that might address this specific error. SAP frequently updates their knowledge base with solutions for known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM51: To check the status of application servers.
  SM21: To view system logs.
  
  
  
  Documentation: Refer to the official SAP documentation for ATC and enqueue server management for more detailed information.
  
  
  SAP Community: Engaging with the SAP Community forums can also provide insights from other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to diagnose and resolve the SWLT116 error in your SAP system.