How To Fix KA203 - System error during locking

SAP Error Message - Details

• Message type: E = Error

• Message class: KA - CO Overhead Costs: Overhead, Accrual Calculation

• Message number: 203

• Message text: System error during locking

What causes this issue?

A system error occurred during locking.

How to fix this error?

Inform 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 KA203 - System error during locking ?

  The SAP error message KA203, which states "System error during locking," typically occurs in the context of the Controlling (CO) module when there is an issue with the locking mechanism that SAP uses to prevent data inconsistencies during transactions. This error can arise due to various reasons, including database issues, system configuration problems, or issues with the application server.
  Causes:
  
  Database Lock Issues: The database may have encountered a problem while trying to lock a record, which can happen if there are deadlocks or if the database is under heavy load.
  Application Server Problems: If the application server is experiencing issues, it may not be able to handle the locking requests properly.
  Configuration Issues: Incorrect configuration settings in the SAP system can lead to locking problems.
  Network Issues: Network interruptions can cause communication problems between the application server and the database.
  Concurrent Access: Multiple users or processes trying to access the same data simultaneously can lead to locking conflicts.
  
  Solutions:
  
  Check System Logs: Review the system logs (transaction SM21) for any related error messages that could provide more context about the issue.
  Database Lock Table: Use transaction SM12 to check for any existing locks that may be causing the issue. You can delete unnecessary locks if they are no longer needed.
  Restart Application Server: If the issue persists, consider restarting the application server to clear any temporary issues.
  Check for Deadlocks: Use transaction ST22 to check for short dumps that may indicate deadlocks or other critical errors.
  Review Configuration: Ensure that the configuration settings for the CO module and the database are correct and optimized.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches.
  Contact SAP Support: If the issue cannot be resolved internally, consider reaching out to SAP Support for assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM21 (System Log), SM12 (Lock Entries), ST22 (Dump Analysis), and SM37 (Job Monitoring) to diagnose and troubleshoot 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.
  Documentation: Review SAP documentation related to the CO module and locking mechanisms for a deeper understanding of how locking works in SAP.
  
  By following these steps, you should be able to identify the cause of the KA203 error and implement a solution to resolve it.