How To Fix /SAPAPO/ATP_BOP026 - Hierarchy &1 is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP_BOP -

• Message number: 026

• Message text: Hierarchy &1 is unknown

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP_BOP026 - Hierarchy &1 is unknown ?

  The SAP error message /SAPAPO/ATP_BOP026 Hierarchy &1 is unknown typically occurs in the context of Advanced Planning and Optimization (APO) when the system cannot find a specified hierarchy in the system. This can happen during various processes, such as when performing availability checks or during planning activities.
  Cause:
  
  Missing Hierarchy: The specified hierarchy (denoted by &1 in the error message) does not exist in the system. This could be due to it not being created or it being deleted.
  Incorrect Configuration: The configuration settings for the planning area or the product master may not be set up correctly, leading to the system not recognizing the hierarchy.
  Transport Issues: If the hierarchy was recently transported from another system, there may have been issues during the transport process that caused it not to be available in the target system.
  Authorization Issues: The user may not have the necessary authorizations to access the hierarchy.
  
  Solution:
  
  Check Hierarchy Existence: Verify if the hierarchy exists in the system. You can do this by navigating to the relevant transaction (e.g., /SAPAPO/HIERARCHY) and checking if the hierarchy is listed.
  Create or Restore Hierarchy: If the hierarchy does not exist, you may need to create it or restore it from a backup or transport request.
  Review Configuration: Check the configuration settings in the planning area and ensure that the hierarchy is correctly assigned. This can be done in the transaction /SAPAPO/MC62 (for planning area settings).
  Transport Check: If the hierarchy was supposed to be transported, check the transport logs for any errors and ensure that the transport was successful.
  Authorization Check: Ensure that the user has the necessary authorizations to access the hierarchy. This can be checked in the user roles and profiles.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/HIERARCHY, /SAPAPO/MC62, and /SAPAPO/MC73 for managing hierarchies and planning areas.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP APO documentation for more details on hierarchy management and configuration.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or APO support team for further assistance.