How To Fix RH176 - The subtree contains multiple root nodes

SAP Error Message - Details

• Message type: E = Error

• Message class: RH - BW: Hierarchies ( basic functions )

• Message number: 176

• Message text: The subtree contains multiple root nodes

What causes this issue?

The hierarchy to be created as a subtree contains several root nodes
(the nodes with IDs &V1& and &V2&). A hierarchy that is to be created
as a subtree may only contain one root node.

System Response

The hierarchy was not created as a subtree.

How to fix this error?

Correct the hierarchy and reload it.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RH176 - The subtree contains multiple root nodes ?

  The SAP error message RH176, which states "The subtree contains multiple root nodes," typically occurs in the context of organizational management (OM) or personnel administration when there is an issue with the hierarchical structure of the organizational units or positions in the system.
  Cause:
  This error usually arises when there is an inconsistency in the organizational structure, specifically when the system detects that there are multiple root nodes in a hierarchy where only one is expected. This can happen due to:
  
  Incorrect Data Entry: Multiple organizational units or positions may have been incorrectly defined as root nodes.
  Data Migration Issues: If data has been migrated from another system, it may not have been structured correctly, leading to multiple root nodes.
  Manual Changes: Manual changes to the organizational structure that do not adhere to the hierarchical rules can also lead to this error.
  Inconsistent Relationships: Relationships between nodes (e.g., reporting lines) may not be properly defined, causing the system to interpret multiple roots.
  
  Solution:
  To resolve the RH176 error, you can take the following steps:
  
  
  Check the Organizational Structure:
  
  Use transaction codes like PPOME (for Organizational Management) or PPOSE (for Position Management) to visualize the organizational structure.
  Identify and review the nodes in the hierarchy to find any inconsistencies.
  
  
  
  Identify Root Nodes:
  
  Determine which nodes are incorrectly set as root nodes. There should only be one root node in a well-defined hierarchy.
  
  
  
  Correct the Structure:
  
  Adjust the organizational units or positions to ensure that there is only one root node. This may involve:
  
  Deleting or merging duplicate root nodes.
  Correcting the reporting structure to ensure proper parent-child relationships.
  
  
  
  
  
  Data Consistency Check:
  
  Run consistency checks on the organizational structure to identify any other potential issues. This can often be done through specific reports or tools within SAP.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on maintaining the organizational structure.
  
  
  
  Seek Help from SAP Support:
  
  If the issue persists or if you are unsure about making changes, consider reaching out to SAP support or consulting with an SAP expert.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as PPOME, PPOSE, and others related to organizational management.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches.
  Training and Documentation: Ensure that users involved in maintaining the organizational structure are trained and have access to proper documentation to avoid similar issues in the future.
  
  By following these steps, you should be able to resolve the RH176 error and maintain a consistent organizational structure in your SAP system.