How To Fix /SAPAPO/STOCK026 - Locking conflict when posting stock (Retry)

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/STOCK -

• Message number: 026

• Message text: Locking conflict when posting stock (Retry)

Self-Explanatory Message

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• What is the cause and solution for SAP error message /SAPAPO/STOCK026 - Locking conflict when posting stock (Retry) ?

  The SAP error message /SAPAPO/STOCK026 Locking conflict when posting stock (Retry) typically occurs in the SAP Advanced Planning and Optimization (APO) module when there is a locking conflict during stock postings. This can happen for several reasons, including concurrent processes trying to access the same data or a long-running transaction that holds a lock on the data.
  Causes:
  
  Concurrent Transactions: Multiple users or processes trying to post stock simultaneously can lead to locking conflicts.
  Long-Running Transactions: A transaction that takes a long time to complete may hold a lock on the data, preventing other transactions from accessing it.
  System Performance Issues: If the system is slow, it may exacerbate locking issues, as transactions take longer to complete.
  Configuration Issues: Incorrect configuration in the APO system can lead to unexpected locking behavior.
  
  Solutions:
  
  Retry the Operation: The simplest solution is to wait a moment and then retry the stock posting. This may resolve the issue if the lock is released.
  Check for Active Sessions: Use transaction codes like SM12 to check for active locks. If you find locks that are no longer needed, you can delete them (with caution).
  Analyze Long-Running Transactions: Use transaction SM66 to monitor active processes and identify any long-running transactions that may be causing locks.
  Optimize Processes: Review and optimize the processes that are posting stock to reduce the likelihood of concurrent access.
  Increase System Resources: If the system is under heavy load, consider increasing resources (CPU, memory) to improve performance.
  Review Configuration: Ensure that the APO system is configured correctly to handle stock postings efficiently.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM66: To monitor active processes in the system.
  ST22: To check for dumps that may provide additional context on the error.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation for best practices on managing stock postings and handling locking issues in APO.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.