How To Fix USMD1042 - Data model &1, entity type &2: Number of leading entity types is invalid

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 042

• Message text: Data model &1, entity type &2: Number of leading entity types is invalid

What causes this issue?

For entity types with storage and use type <LS>3</> for which the check
table is predefined by the data element or domain, the other key fields
in the check table must be mapped using relationships with <LS>Leading
</> as the relationship type. The check table for entity type &V2&
contains &V3& additional key fields. However, &V4& leading entity types
are defined using relationships.

System Response

The data model cannot be saved or activated.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1042 - Data model &1, entity type &2: Number of leading entity types is invalid ?

  The SAP error message USMD1042 typically occurs in the context of SAP Master Data Governance (MDG) when there is an issue with the configuration of the data model, specifically related to the entity types and their relationships.
  Cause:
  The error message indicates that there is an invalid number of leading entity types defined for a specific data model and entity type. This can happen due to several reasons:
  
  Configuration Error: The data model may not be configured correctly, leading to an inconsistency in the number of leading entity types.
  Missing or Incorrect Relationships: The relationships between entity types may not be properly defined, or there may be missing leading entity types that are required for the specific entity type in question.
  Data Model Changes: If there have been recent changes to the data model, such as adding or removing entity types, it may lead to this error if the changes were not properly reflected in the configuration.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Data Model Configuration:
  
  Go to the MDG data model configuration in the SAP system.
  Verify the configuration of the data model and ensure that the leading entity types are correctly defined for the entity type mentioned in the error message.
  
  
  
  Review Entity Relationships:
  
  Check the relationships between the entity types in the data model.
  Ensure that all required leading entity types are included and that their relationships are correctly established.
  
  
  
  Adjust Leading Entity Types:
  
  If necessary, adjust the number of leading entity types for the specific entity type to match the expected configuration.
  This may involve adding or removing leading entity types based on the business requirements.
  
  
  
  Test Changes:
  
  After making the necessary adjustments, test the changes to ensure that the error no longer occurs.
  You may need to perform a data model activation or transport the changes to the relevant environment.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific version of MDG you are using for any additional guidance or known issues.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MDGIMG to access the configuration settings for Master Data Governance.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the USMD1042 error in your SAP MDG environment.