How To Fix KO279 - System error during locking

SAP Error Message - Details

• Message type: E = Error

• Message class: KO - Master data for CO orders

• Message number: 279

• Message text: System error during locking

What causes this issue?

A system error occurred during blocking.

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?

Please notify your systems analyst.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KO279 - System error during locking ?

  The SAP error message KO279, which states "System error during locking," typically occurs in the context of controlling (CO) or financial (FI) transactions when the system encounters an issue while trying to lock a resource for processing. This can happen during various operations, such as posting transactions, running reports, or executing batch jobs.
  Causes:
  
  Database Lock Issues: The error may arise due to problems with database locks, where the system is unable to acquire a lock on a required resource.
  Concurrency Issues: Multiple users or processes trying to access the same resource simultaneously can lead to locking conflicts.
  System Performance: High system load or performance issues can cause delays in acquiring locks, leading to timeouts and errors.
  Configuration Issues: Incorrect configuration settings in the SAP system can also lead to locking problems.
  Transport Issues: If there are ongoing transports or changes being made to the system, it may cause temporary locking issues.
  
  Solutions:
  
  Check Lock Entries: Use transaction code SM12 to check for existing lock entries. If you find any orphaned locks, you can delete them if they are no longer needed.
  Review System Performance: Monitor system performance using transaction codes like ST22 (dump analysis) and SM21 (system log) to identify any underlying issues that may be affecting locking.
  Increase Lock Timeout: If the issue is related to timeouts, consider increasing the lock timeout settings in the system configuration.
  Batch Job Management: If the error occurs during batch processing, review the batch jobs to ensure they are not conflicting with each other.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide patches and updates.
  System Restart: In some cases, a system restart may help clear temporary issues causing locking problems.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (lock entries), SM21 (system log), ST22 (dump analysis), and SM37 (job monitoring).
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error, including any relevant logs and system configurations.
  Documentation: Review SAP documentation and community forums for additional insights and troubleshooting steps related to locking issues.
  
  By following these steps, you should be able to diagnose and resolve the KO279 error effectively.