How To Fix UPC420 - Hierarchy &1 cannot be used

SAP Error Message - Details

• Message type: E = Error

• Message class: UPC - Planning: General Error Messages

• Message number: 420

• Message text: Hierarchy &1 cannot be used

What causes this issue?

You can only use those BW hierarchies that have a unique root node.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UPC420 - Hierarchy &1 cannot be used ?

  The SAP error message UPC420, which states "Hierarchy &1 cannot be used," typically occurs in the context of SAP's planning and controlling modules, particularly when dealing with hierarchies in the context of planning functions or reporting.
  Cause:
  The error can arise due to several reasons, including:
  
  Hierarchy Not Active: The hierarchy you are trying to use may not be active or may not have been properly defined in the system.
  Incorrect Hierarchy Type: The hierarchy type may not be compatible with the operation you are trying to perform.
  Missing Authorizations: The user may not have the necessary authorizations to access or use the specified hierarchy.
  Hierarchy Deletion: The hierarchy may have been deleted or is in a state that prevents it from being used.
  Data Consistency Issues: There may be inconsistencies in the data related to the hierarchy, such as missing nodes or incorrect relationships.
  
  Solution:
  To resolve the UPC420 error, you can take the following steps:
  
  
  Check Hierarchy Status:
  
  Go to the relevant transaction (e.g., transaction code RSD1 for InfoObjects) and check if the hierarchy is active.
  If it is inactive, activate it.
  
  
  
  Verify Hierarchy Type:
  
  Ensure that the hierarchy type is appropriate for the context in which you are trying to use it.
  
  
  
  Review Authorizations:
  
  Check the user’s authorizations to ensure they have the necessary permissions to access the hierarchy.
  
  
  
  Check for Deletion:
  
  Confirm that the hierarchy has not been deleted or marked for deletion.
  
  
  
  Data Consistency Check:
  
  Run consistency checks on the hierarchy to identify and resolve any data issues.
  
  
  
  Recreate Hierarchy:
  
  If the hierarchy is corrupted or cannot be fixed, consider recreating it from scratch.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific details related to the hierarchy you are working with.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSD1 (to manage InfoObjects and hierarchies) and RSC1 (to maintain hierarchies).
  SAP Notes: Check SAP Notes for any known issues or patches related to the UPC420 error.
  Support: If the issue persists, consider reaching out to your SAP support team or consulting SAP Community forums for additional assistance.
  
  By following these steps, you should be able to identify the cause of the UPC420 error and implement a suitable solution.