How To Fix /SAPAPO/DP_EVENT153 - Event Catalog &1 is on the top level of the hierarchy, cannot unassign

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/DP_EVENT -

• Message number: 153

• Message text: Event Catalog &1 is on the top level of the hierarchy, cannot unassign

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/DP_EVENT153 - Event Catalog &1 is on the top level of the hierarchy, cannot unassign ?

  The SAP error message /SAPAPO/DP_EVENT153 indicates that you are trying to unassign an event catalog that is at the top level of the hierarchy in the Demand Planning (DP) module of SAP Advanced Planning and Optimization (APO). This error typically occurs when you attempt to remove or unassign a top-level event catalog from a planning book or a data view, which is not allowed because it serves as a parent for other elements in the hierarchy.
  Cause:
  
  Top-Level Hierarchy: The event catalog you are trying to unassign is the top-level node in the hierarchy. In SAP, top-level nodes cannot be unassigned or deleted as they are essential for maintaining the structure of the hierarchy.
  Data Dependencies: There may be other dependent objects or data that rely on this top-level event catalog, making it necessary to keep it intact.
  
  Solution:
  
  Check Hierarchy Structure: Review the hierarchy structure in your event catalog. Ensure that you are not trying to unassign a top-level node. If you need to make changes, consider modifying the child nodes instead.
  Reassign or Delete Child Nodes: If you need to remove the event catalog, first reassign or delete any child nodes or dependent objects that are linked to it. Once all dependencies are removed, you may be able to unassign the top-level event catalog.
  Use Alternative Methods: If your goal is to stop using the event catalog, consider marking it as inactive or using other methods to exclude it from planning without unassigning it.
  Consult Documentation: Refer to SAP documentation or help resources for more detailed instructions on managing event catalogs and hierarchies in SAP APO.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Training and Documentation: Consider reviewing training materials or documentation related to SAP APO and Demand Planning to better understand the hierarchy and event catalog management.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who specializes in SAP APO for further assistance.