How To Fix QB201 - System error occurred during the locking procedure

SAP Error Message - Details

• Message type: E = Error

• Message class: QB - Message IDs for QM in procurement

• Message number: 201

• Message text: System error occurred during the locking procedure

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message QB201 - System error occurred during the locking procedure ?

  The SAP error message QB201, which states "System error occurred during the locking procedure," typically indicates that there is an issue with the locking mechanism in the SAP system. This can occur during various operations, such as when trying to create or modify documents, and it usually points to a problem with the database or the application server.
  Causes:
  
  Database Lock Issues: The error may arise if there are issues with database locks, such as deadlocks or contention for resources.
  Application Server Problems: If the application server is experiencing issues, it may not be able to handle the locking requests properly.
  Network Issues: Network problems can lead to communication failures between the application server and the database.
  Configuration Issues: Incorrect configuration settings in the SAP system can lead to locking problems.
  System Performance: High load on the system can cause delays in processing locking requests, leading to timeouts and errors.
  
  Solutions:
  
  Check System Logs: Review the system logs (transaction SM21) for any related error messages that could provide more context about the issue.
  Transaction SM12: Use transaction SM12 to check for any orphaned locks. If you find locks that should not be there, you can delete them, but be cautious as this can affect other users.
  Transaction SM21: Check the system log for any additional error messages that might indicate the root cause of the locking issue.
  Restart Application Server: If the issue persists, consider restarting the application server to clear any temporary issues.
  Database Check: Perform a database check to ensure that there are no underlying issues with the database itself.
  Consult Basis Team: If you are unable to resolve the issue, consult your SAP Basis team for further investigation. They may need to analyze the system performance, database locks, and configuration settings.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide patches.
  
  Related Information:
  
  SAP Support: If the issue is not resolved through the above steps, consider reaching out to SAP Support for assistance.
  Documentation: Review SAP documentation related to locking mechanisms and error handling for more insights.
  Performance Monitoring: Implement performance monitoring tools to keep an eye on system performance and locking behavior.
  
  By following these steps, you should be able to diagnose and potentially resolve the QB201 error in your SAP system.