How To Fix UGMD506 - Node &1 has an ambiguous sequence of subnodes

SAP Error Message - Details

• Message type: E = Error

• Message class: UGMD - FIN Master Data: Messages

• Message number: 506

• Message text: Node &1 has an ambiguous sequence of subnodes

What causes this issue?

When reading the hierarchy structure from remote storage (BW or ERP) the
following error occurs:
Node &v1& appears repeatedly, and has an <ZH>irregular sequence to its
subnodes</>.
The following found locations are problematic: hierarchies &v2&, &v3&,
hierarchy version &v4&.

System Response

In the application, only a standard node structure for all hierarchies
is supported. Consequently, in this instance only the sequence of the
subnodes according to the first found location is transferred.
The display of the hierarchy in the application does not therefore
correspond to what is expected.

How to fix this error?

Standardize the definition of the hierarchies concerned so that the same
nodes within the same validity (version, time) always occur with the
same subnodes in the same sequence in all places.

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 UGMD506 - Node &1 has an ambiguous sequence of subnodes ?

  The SAP error message UGMD506 indicates that there is an ambiguity in the sequence of subnodes for a specific node in a hierarchical structure, such as a master data structure or a configuration in SAP. This typically occurs in scenarios involving data models, such as those used in SAP Master Data Governance (MDG) or other applications that utilize hierarchical data structures.
  Cause:
  The ambiguity arises when the system encounters multiple paths or sequences that can lead to the same subnode, making it unclear which path should be followed. This can happen due to:
  
  Duplicate Entries: There may be duplicate entries in the hierarchy that lead to the same subnode.
  Incorrect Configuration: The configuration of the nodes and their relationships may not be set up correctly, leading to conflicting paths.
  Data Integrity Issues: There may be issues with the data integrity, such as missing or incorrectly linked nodes.
  
  Solution:
  To resolve the UGMD506 error, you can follow these steps:
  
  
  Check the Hierarchy Structure:
  
  Review the hierarchy structure for the node in question. Ensure that there are no duplicate entries or conflicting paths leading to the same subnode.
  
  
  
  Validate Node Relationships:
  
  Ensure that the relationships between nodes are correctly defined. Each node should have a clear and unique path to its subnodes.
  
  
  
  Data Cleanup:
  
  If duplicates or incorrect entries are found, clean up the data by removing or correcting the entries that cause ambiguity.
  
  
  
  Use Transaction Codes:
  
  Utilize relevant transaction codes (like MDG_MAT for material master data) to check and maintain the hierarchy structure.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on managing hierarchical data structures in your version of SAP.
  
  
  
  Testing:
  
  After making changes, test the hierarchy to ensure that the error no longer occurs and that the data behaves as expected.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific configuration and data.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation for Master Data Governance or the specific module you are working with to understand best practices for managing hierarchical data.
  
  By following these steps, you should be able to identify and resolve the ambiguity causing the UGMD506 error in your SAP system.