How To Fix COM_DML_ENGINE051 - Hierarchy was changed

SAP Error Message - Details

• Message type: E = Error

• Message class: COM_DML_ENGINE - MDF Processing Layer

• Message number: 051

• Message text: Hierarchy was changed

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message COM_DML_ENGINE051 - Hierarchy was changed ?

  The SAP error message COM_DML_ENGINE051 indicates that a hierarchy has been changed in the context of a data manipulation operation, which can occur in various SAP modules, particularly in the context of SAP Controlling (CO) or SAP Product Lifecycle Management (PLM). This error typically arises when there is an inconsistency between the data being processed and the current state of the hierarchy in the system.
  Cause:
  
  Hierarchy Changes: The hierarchy structure (e.g., cost centers, profit centers, or other organizational units) has been modified after the data was initially loaded or processed. This can include adding, deleting, or changing nodes in the hierarchy.
  Data Consistency: The data being processed may reference a hierarchy that has been altered, leading to inconsistencies.
  Concurrent Changes: Multiple users or processes may be trying to modify the hierarchy simultaneously, causing conflicts.
  
  Solution:
  
  Refresh Data: Ensure that the data being processed is refreshed to reflect the current state of the hierarchy. This may involve reloading or reprocessing the data.
  Check Hierarchy Changes: Review any recent changes made to the hierarchy. If changes were made, ensure that all dependent data is updated accordingly.
  Consistency Check: Run consistency checks in the relevant module to identify and resolve any discrepancies between the data and the hierarchy.
  Locking Mechanism: If concurrent changes are an issue, consider implementing a locking mechanism to prevent simultaneous modifications to the hierarchy.
  Error Logs: Check the application logs for more detailed information about the error and any related issues that may provide further insights.
  
  Related Information:
  
  Transaction Codes: Depending on the module, you may use transaction codes like KAH1 (Create Cost Center Hierarchy), KAH2 (Change Cost Center Hierarchy), or KAH3 (Display Cost Center Hierarchy) to manage hierarchies.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to this error message.
  Documentation: Review SAP documentation related to the specific module you are working with for best practices on managing hierarchies and data consistency.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or functional team for further investigation and support.