How To Fix HPC034 - Generation of hierarchy type &2 failed; class &1 locked

SAP Error Message - Details

• Message type: E = Error

• Message class: HPC - Classification-Based Product Hierarchy

• Message number: 034

• Message text: Generation of hierarchy type &2 failed; class &1 locked

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message HPC034 - Generation of hierarchy type &2 failed; class &1 locked ?

  The SAP error message HPC034 indicates that there was a failure in generating a hierarchy due to the specified class being locked. This typically occurs in the context of SAP's Hierarchy Management, where certain classes or objects are locked to prevent concurrent modifications that could lead to data inconsistencies.
  Cause:
  
  Class Locking: The class specified in the error message is currently locked by another user or process. This can happen if someone is editing the class or if a background job is running that is using the class.
  Transaction Lock: The transaction that is trying to generate the hierarchy is unable to proceed because it cannot obtain the necessary locks on the class.
  System Configuration: There may be configuration settings that are causing the class to be locked during certain operations.
  
  Solution:
  
  Check Locks: Use transaction code SM12 to check for any existing locks on the class. If you find that a lock exists, you can determine who holds the lock and whether it is safe to remove it.
  Wait for Release: If the lock is held by another user or process, you may need to wait until that user completes their task or the background job finishes.
  Release Locks: If you determine that the lock is no longer needed (e.g., the user has left the session), you can manually delete the lock entry in SM12. Be cautious with this approach, as it may lead to data inconsistencies if the other process is still active.
  Check Background Jobs: If a background job is causing the lock, you can check the job status using transaction SM37. If the job is stuck or taking too long, you may need to cancel it.
  Review Configuration: Ensure that the configuration settings for hierarchy management are correct and that there are no settings that could lead to unnecessary locking.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM37: To monitor background jobs.
  SE11: To check the data dictionary for the class definition.
  
  
  Documentation: Refer to SAP Help documentation for Hierarchy Management for more details on how classes and hierarchies are managed.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.