How To Fix UD321 - No generalizations exist

UD321 - Overview

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 321

• Message text: No generalizations exist

What causes this issue?

No generalizations exist for the entity type you selected. The
displayed list shows the format used to display existing
generalizations:
source entity
specialization category

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UD321 - No generalizations exist ?

  The SAP error message UD321 ("No generalizations exist") typically occurs in the context of the SAP system when dealing with the classification of materials or objects, particularly when using the classification system or when trying to create or modify characteristics or classes.
  
  Cause:
  The error message UD321 indicates that there are no generalizations defined for the specific class or characteristic you are trying to work with. Generalizations are used in the classification system to define relationships between classes and to allow for the inheritance of characteristics from a general class to a more specific subclass. If no generalizations exist, the system cannot find the necessary relationships to proceed with the operation you are attempting.
  
  Solution:
  To resolve the UD321 error, you can take the following steps:
  
  
  Check Class Hierarchy: Verify the class hierarchy in the classification system. Ensure that the class you are working with has been properly defined and that there are generalizations set