How To Fix SQ120 - Queue & SELECT APQD return code &

SAP Error Message - Details

• Message type: E = Error

• Message class: SQ - Queue Administration Transaction: Error Texts

• Message number: 120

• Message text: Queue & SELECT APQD return code &

What causes this issue?

Technical error message: A SELECT on Table APQD returned the value &1&.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SQ120 - Queue & SELECT APQD return code & ?

  The SAP error message SQ120, which is related to the queue and SELECT APQD return code, typically indicates an issue with the SAP enqueue mechanism. This error can occur in various scenarios, often related to the enqueue server or the database.
  Cause:
  
  Enqueue Server Issues: The enqueue server may not be running or may have encountered an error.
  Database Lock Issues: There may be locks on the database that are preventing the enqueue from processing requests.
  Network Issues: Network problems can lead to communication failures between the application server and the enqueue server.
  Configuration Issues: Incorrect configuration settings in the SAP system can lead to this error.
  Resource Limitations: Insufficient resources (like memory or CPU) on the application server or enqueue server can cause this error.
  
  Solution:
  
  Check Enqueue Server Status: Ensure that the enqueue server is running. You can check this in the SAP system using transaction code SM51 to see the status of application servers.
  Restart Enqueue Server: If the enqueue server is down, restart it. This can often resolve temporary issues.
  Check Locks: Use transaction SM12 to check for any locks that may be causing the issue. If there are unnecessary locks, you can delete them (with caution).
  Review System Logs: Check the system logs (transaction SM21) for any related error messages that might provide more context on the issue.
  Network Check: Ensure that there are no network issues affecting communication between the application server and the enqueue server.
  Configuration Review: Review the configuration settings in transaction RZ10 or RZ11 to ensure they are set correctly.
  Resource Monitoring: Monitor system resources using transaction ST02 or ST03 to ensure that the system is not under heavy load.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the specific error message for any patches or updates that may address the issue.
  SAP Community: The SAP Community forums can be a valuable resource for finding similar issues and solutions shared by other users.
  Documentation: Refer to the official SAP documentation for more detailed information on enqueue mechanisms and troubleshooting steps.
  
  If the issue persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.