How To Fix TD644 - System error in the lock management

SAP Error Message - Details

• Message type: E = Error

• Message class: TD - SAPscript: Text editor, composer, forms, styles and fonts

• Message number: 644

• Message text: System error in the lock management

What causes this issue?

Internal error in the lock management.

System Response

Error message

How to fix this error?

Contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TD644 - System error in the lock management ?

  The SAP error message TD644, which indicates a "System error in the lock management," typically arises from issues related to the lock table in the SAP system. This error can occur due to various reasons, including:
  Causes:
  
  Lock Table Overflow: The lock table may be full, which can happen if there are too many locks being held or if the system is not configured to handle the number of concurrent users.
  Database Issues: Problems with the underlying database, such as corruption or connectivity issues, can lead to lock management errors.
  System Configuration: Incorrect configuration settings in the SAP system or the database can lead to issues with lock management.
  Transport Issues: If the error occurs during a transport operation, it may be related to issues with the transport directory or the transport management system.
  System Bugs: There may be bugs in the SAP kernel or specific components that lead to this error.
  
  Solutions:
  
  Check Lock Table Size: Increase the size of the lock table if it is full. This can be done by adjusting the profile parameters in the instance profile (e.g., enque/table_size).
  Monitor Locks: Use transaction codes like SM12 to monitor and manage locks. You can check for any unnecessary locks and delete them if they are no longer needed.
  Database Check: Perform a database check to ensure that there are no underlying issues. This may involve running database-specific tools or commands to check for corruption or performance issues.
  Review System Logs: Check the system logs (transaction SM21) for any related error messages that could provide more context about the issue.
  Kernel Upgrade: If the issue is due to a bug in the SAP kernel, consider upgrading to the latest version or applying relevant patches.
  Restart the Instance: In some cases, restarting the SAP instance can help clear temporary issues related to lock management.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to TD644 for specific guidance and patches. You can search for relevant notes in the SAP Support Portal.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Documentation: Review SAP documentation regarding lock management and performance tuning to ensure your system is optimally configured.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.