How To Fix BT061 - The enqueue subsystem reports an internal error; see the system log

SAP Error Message - Details

• Message type: E = Error

• Message class: BT - Background processing messages

• Message number: 061

• Message text: The enqueue subsystem reports an internal error; see the system log

What causes this issue?

The SAP system was unable to lock a resource for your use because of a
problem in the lock management system.

System Response

Access to resource denied.

How to fix this error?

To analyze this problem, start by checking <DS:TRAN.SM21>the system log
</> for relevant messages or by using the analysis functions in
<DS:TRAN.SM12>the lock management system</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BT061 - The enqueue subsystem reports an internal error; see the system log ?

  The SAP error message BT061 indicates that there is an issue with the enqueue subsystem, which is responsible for managing locks in the SAP system. This error typically arises when there is an internal error in the enqueue server, which can lead to problems with data consistency and integrity.
  Causes of BT061 Error
  
  Enqueue Server Issues: The enqueue server may be down or not functioning correctly.
  Network Problems: There could be network issues affecting communication between the application server and the enqueue server.
  Resource Limitations: The system may be running low on resources (memory, CPU, etc.), causing the enqueue server to fail.
  Configuration Errors: Incorrect configuration settings in the SAP system can lead to enqueue errors.
  Database Issues: Problems with the underlying database can also affect the enqueue subsystem.
  Software Bugs: There may be bugs in the SAP kernel or enqueue server that need to be addressed.
  
  Solutions to BT061 Error
  
  Check System Logs: Review the system logs (transaction SM21) for more detailed error messages that can provide insights into the root cause.
  Restart Enqueue Server: If the enqueue server is down, restart it. This can often resolve temporary issues.
  Check Network Connectivity: Ensure that there are no network issues between the application server and the enqueue server.
  Monitor System Resources: Use transaction ST02 (buffer management) and ST06 (OS monitoring) to check for resource bottlenecks.
  Review Configuration: Verify the configuration settings for the enqueue server in the SAP system. Ensure that they are set correctly.
  Update SAP Kernel: If the issue is due to a bug, consider updating the SAP kernel to the latest version.
  Check Database Health: Ensure that the database is functioning correctly and that there are no issues affecting its performance.
  Contact SAP Support: If the problem persists, consider reaching out to SAP support for further assistance.
  
  Related Information
  
  
  Transaction Codes: 
  
  SM21: System Log
  SM12: Display and Delete Locks
  SM37: Job Monitoring
  ST02: Tune Summary
  ST06: Operating System Monitor
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches.
  
  
  Documentation: Review the official SAP documentation for the enqueue server and locking mechanisms for a deeper understanding of how they work.
  
  
  By following these steps, you should be able to diagnose and resolve the BT061 error in your SAP system.