How To Fix MDG_MDF300 - Leaf &1 belongs to type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_MDF - Master Data: Messages

• Message number: 300

• Message text: Leaf &1 belongs to type &2

What causes this issue?

Value &v1& of characteristic &v2& is defined as a leaf in the hierarchy
-- that is, no further nodes are attached to it. However, a leaf must
belong to the hierarchy-defining characteristic &v3&.

System Response

The hierarchy cannot be used.

How to fix this error?

Modify the hierarchy either by deleting the node from the hierarchy or
by adding more nodes beneath.

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 MDG_MDF300 - Leaf &1 belongs to type &2 ?

  The SAP error message MDG_MDF300 "Leaf &1 belongs to type &2" typically occurs in the context of Master Data Governance (MDG) when there is an issue with the hierarchy or structure of master data objects. This error indicates that there is a mismatch or inconsistency in the data hierarchy, specifically that a leaf node (a node that does not have any children) is being referenced incorrectly.
  Cause:
  
  Hierarchy Structure Issue: The leaf node (e.g., a specific master data record) is not correctly associated with its parent node or is being treated as a different type than expected.
  Data Type Mismatch: The system expects a certain type of data (e.g., a specific category or classification) but finds a different type.
  Configuration Errors: There may be issues in the configuration of the data model or the hierarchy settings in MDG.
  Data Integrity Issues: The data might have been manually altered or imported incorrectly, leading to inconsistencies.
  
  Solution:
  
  Check Hierarchy Structure: Review the hierarchy structure in the MDG application to ensure that the leaf node is correctly placed under the appropriate parent node.
  Verify Data Types: Ensure that the data types of the nodes in the hierarchy are consistent and correctly defined. Check the configuration settings for the master data type involved.
  Data Validation: Run data validation checks to identify any inconsistencies or errors in the master data records. Correct any discrepancies found.
  Configuration Review: If the issue persists, review the configuration settings in the MDG system for the specific data model and hierarchy settings. Ensure that they align with the business requirements.
  Consult Documentation: Refer to SAP documentation or notes related to MDG and the specific error message for additional guidance and troubleshooting steps.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches and updates.
  MDG Configuration Guide: Review the MDG configuration guide for best practices on setting up hierarchies and data types.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  If the problem continues after following these steps, it may be beneficial to involve your SAP support team or consult with an SAP expert for further assistance.