How To Fix TT321 - System error locking &

SAP Error Message - Details

• Message type: E = Error

• Message class: TT - Extended Computer Aided Test Tool (eCATT) messages

• Message number: 321

• Message text: System error locking &

What causes this issue?

You were attempting to create a procedure. This failed because
another user also generated a new procedure.

System Response

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

How to fix this error?

Wait a moment, and then attempt this again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TT321 - System error locking & ?

  The SAP error message TT321, which indicates a "System error locking &", typically arises when there is an issue with the locking mechanism in the SAP system. This can occur due to various reasons, such as:
  Causes:
  
  Database Lock Conflicts: Multiple users or processes trying to access the same data simultaneously can lead to lock conflicts.
  System Resource Issues: Insufficient system resources (like memory or CPU) can cause locking mechanisms to fail.
  Transport Issues: Problems during transport requests can lead to inconsistencies in the locking tables.
  Database Issues: Corruption or issues within the database can also lead to locking errors.
  Long-running Transactions: If a transaction takes too long to complete, it may hold locks longer than expected, causing other processes to fail.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. You can delete unnecessary locks if they are no longer needed.
  Analyze System Performance: Monitor system performance using transaction codes like ST02 (buffer management) and ST04 (database performance) to identify any resource bottlenecks.
  Review Long-running Transactions: Identify and analyze any long-running transactions using transaction code SM50 or SM66 to see if they can be optimized or terminated.
  Database Consistency Check: Perform a consistency check on the database to ensure there are no underlying issues. This may require the assistance of a database administrator.
  Restart the Application Server: In some cases, restarting the application server can resolve temporary locking issues.
  Check Transport Requests: If the error occurred after a transport, check the transport logs for any errors and ensure that the transport was completed successfully.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to TT321 for any specific patches or updates that may address the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that could provide more context about the locking issue.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.