How To Fix COM_HIERARCHY009 - Hierarchy is already being maintained by user '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_HIERARCHY - Hierarchy

• Message number: 009

• Message text: Hierarchy is already being maintained by user '&1'

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message COM_HIERARCHY009 - Hierarchy is already being maintained by user '&1' ?

  The SAP error message COM_HIERARCHY009 indicates that a hierarchy is currently being maintained by another user. This typically occurs in the context of maintaining master data or hierarchies in SAP, particularly in modules like SAP Controlling (CO) or SAP Product Lifecycle Management (PLM).
  
  Cause:
  
  Concurrent Access: Another user is currently editing the same hierarchy, which locks the hierarchy for other users to prevent data inconsistencies.
  Session Timeout: A previous session may not have been properly closed, leaving the hierarchy in a locked state.
  System Lock: The system may have a lock on the hierarchy due to a transaction that has not been completed or has failed.
  
  
  Solution:
  
  Wait and Retry: If another user is editing the hierarchy, you may need to wait until they finish and release the lock. You can check with your colleagues to see if they are working on it.
  Check Lock Entries: Use transaction code SM12 to check for lock entries. You can