How To Fix UD321 - No generalizations exist

SAP Error Message - Details

• 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 up.
  
  
  Create Generalizations: If no generalizations exist, you may need to create them. This can be done in the SAP system by:
  
  Navigating to the classification system (Transaction CL02 for classes).
  Selecting the class in question.
  Adding generalizations by linking it to a higher-level class that has the necessary characteristics.
  
  
  
  Review Characteristics: Ensure that the characteristics you are trying to use are correctly defined and linked to the appropriate classes. If characteristics are missing or incorrectly assigned, it may lead to this error.
  
  
  Authorization Check: Ensure that you have the necessary authorizations to view or modify the class and its generalizations. Lack of proper permissions can sometimes lead to misleading error messages.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for more detailed guidance on managing classes and characteristics in the classification system.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more specific assistance based on your system configuration.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL01 (Create Class), CL02 (Change Class), and CL03 (Display Class) for managing classes in the classification system.
  SAP Notes: Check SAP Notes for any known issues or patches related to the classification system that might address this error.
  Training: Consider training or resources on SAP classification and object management to better understand how to manage classes and characteristics effectively.
  
  By following these steps, you should be able to identify the cause of the UD321 error and implement a solution to resolve it.