How To Fix USMD1504 - Mod./ent.&1, node ent.&2, hy.attr.fr.ref.&3: Invalid reference entity

USMD1504 - Overview

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 504

• Message text: Mod./ent.&1, node ent.&2, hy.attr.fr.ref.&3: Invalid reference entity

What causes this issue?

Entity types without their own data elements cannot be used for the
<LS>Hierarchy Attribute from Reference</>.

System Response

The data model will not 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 USMD1504 - Mod./ent.&1, node ent.&2, hy.attr.fr.ref.&3: Invalid reference entity ?

  The SAP error message USMD1504 typically occurs in the context of SAP Master Data Governance (MDG) when there is an issue with the reference entity in a data model. This error indicates that there is an invalid reference to an entity that is expected to be present but is not found or is incorrectly defined.
  
  Cause:
  
  Missing Reference Entity: The entity that is being referenced does not exist in the system.
  Incorrect Configuration: The configuration of the data model may be incorrect, leading to references that do not point to valid entities.
  Data Inconsistency: There may be inconsistencies in the data that prevent the system from recognizing the reference entity.
  Transport Issues: If the data model or configuration was transported from another system, there may have been issues during the transport process that led to missing or incorrect references.
  
  
  Solution:
  
  Check Entity Existence: Verify that the referenced entity (node ent.&2) exists in the system. You can do