How To Fix MSG_UH090 - Root node is missing. A hierarchy must have a root node.

SAP Error Message - Details

• Message type: E = Error

• Message class: MSG_UH - Universal Hierarchy Message Class

• Message number: 090

• Message text: Root node is missing. A hierarchy must have a root node.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MSG_UH090 - Root node is missing. A hierarchy must have a root node. ?

  The SAP error message MSG_UH090 indicates that a hierarchy is expected to have a root node, but the system cannot find one. This error typically occurs in the context of SAP applications that utilize hierarchical data structures, such as SAP BW (Business Warehouse) or SAP ERP systems that manage organizational structures, product hierarchies, or other hierarchical data.
  Cause:
  
  Missing Root Node: The most common cause of this error is that the hierarchy definition does not include a root node. A root node is essential as it serves as the starting point for the hierarchy.
  Incorrect Hierarchy Configuration: The hierarchy may have been incorrectly configured, leading to the absence of a root node.
  Data Integrity Issues: There may be issues with the underlying data that prevent the hierarchy from being constructed correctly.
  Transport Issues: If the hierarchy was transported from one system to another, the root node might not have been included in the transport.
  
  Solution:
  
  
  Check Hierarchy Definition: 
  
  Go to the hierarchy maintenance transaction (e.g., RSH1 for InfoObjects in BW) and verify that a root node is defined.
  Ensure that the root node is correctly linked to its child nodes.
  
  
  
  Create or Reassign Root Node:
  
  If a root node is missing, create a new root node or reassign an existing node to serve as the root.
  Ensure that the root node has the necessary attributes and is properly configured.
  
  
  
  Validate Data:
  
  Check the underlying data for any inconsistencies or missing entries that could affect the hierarchy.
  Ensure that all nodes in the hierarchy are correctly defined and linked.
  
  
  
  Transport Check:
  
  If the hierarchy was transported, check the transport logs to ensure that all necessary objects, including the root node, were included in the transport request.
  
  
  
  Rebuild Hierarchy:
  
  In some cases, it may be necessary to delete and recreate the hierarchy if it is corrupted or improperly configured.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on managing hierarchies in your version of SAP.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSH1 (Hierarchy Maintenance) and RSH2 (Hierarchy Display).
  SAP Notes: Check SAP Notes for any known issues or patches related to hierarchy management.
  User Authorization: Ensure that you have the necessary authorizations to create or modify hierarchies in the system.
  
  By following these steps, you should be able to resolve the MSG_UH090 error and ensure that your hierarchy is correctly configured with a root node.