How To Fix KH178 - Hierarchy & is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: KH - CO-PA Reporting

• Message number: 178

• Message text: Hierarchy & is not unique

What causes this issue?

Only proper hierarchies are supported. That means that each
characteristic value must be assigned to exactly one node. This is not
the case here (see &V3& &V4&).

How to fix this error?

Check your hierarchy &V1& or choose a different hierarchy.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KH178 - Hierarchy & is not unique ?

  The SAP error message KH178 ("Hierarchy & is not unique") typically occurs in the context of SAP Controlling (CO) when dealing with cost center hierarchies or other hierarchical structures. This error indicates that the system has encountered multiple entries that match the criteria for a hierarchy, leading to ambiguity.
  Cause:
  
  Duplicate Hierarchy Entries: The most common cause of this error is that there are multiple entries in the hierarchy that have the same identifier or name, which makes it unclear which one should be used.
  Incorrect Configuration: There may be a misconfiguration in the hierarchy settings or the way the hierarchy is defined in the system.
  Data Integrity Issues: There could be issues with data integrity, such as inconsistencies in the master data that define the hierarchy.
  
  Solution:
  
  Check Hierarchy Definitions: Go to the transaction code for maintaining hierarchies (e.g., KSH1 for cost center hierarchies) and check for duplicate entries. Ensure that each hierarchy has a unique identifier.
  Review Hierarchy Assignments: Verify that the hierarchy assignments are correct and that there are no overlaps or duplicates in the hierarchy structure.
  Data Cleanup: If duplicates are found, you may need to delete or merge the duplicate entries to ensure that each hierarchy is unique.
  Use Unique Identifiers: When creating new hierarchies, ensure that you use unique identifiers and names to avoid conflicts.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on maintaining hierarchies in your version of SAP.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as KSH1 (Create Cost Center Hierarchy), KSH2 (Change Cost Center Hierarchy), and KSH3 (Display Cost Center Hierarchy).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional context or solutions that are specific to your version of SAP.
  User Authorization: Ensure that you have the necessary authorizations to view and modify hierarchies in the system.
  Testing: After making changes, test the hierarchy to ensure that the error does not reoccur and that the hierarchy functions as expected.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a consultant who specializes in SAP Controlling.