How To Fix WW408 - Class type & is not hierarchical. No reclassification possible

SAP Error Message - Details

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 408

• Message text: Class type & is not hierarchical. No reclassification possible

What causes this issue?

It only makes sense to reclassify hierarchical class types (class type
035, for example).

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 WW408 - Class type & is not hierarchical. No reclassification possible ?

  The SAP error message WW408 indicates that you are trying to perform a reclassification of a class type that is not hierarchical. In SAP, class types can be either hierarchical or non-hierarchical, and this error occurs when you attempt to reclassify an object in a non-hierarchical class type.
  Cause:
  
  Class Type Definition: The class type you are working with is defined as non-hierarchical in the system. Non-hierarchical class types do not support the reclassification of objects.
  Incorrect Class Type Usage: You may be trying to use a class type that is not intended for the operation you are attempting to perform.
  
  Solution:
  
  Check Class Type: Verify the class type you are using. You can do this by navigating to the class type configuration in the SAP system (Transaction code: CL02 for class maintenance).
  Use Hierarchical Class Type: If you need to perform reclassification, consider using a hierarchical class type instead. Hierarchical class types allow for subclassing and reclassification.
  Review Configuration: If you believe that the class type should support hierarchical features, review the configuration settings for that class type to ensure it is set up correctly.
  Consult Documentation: Refer to SAP documentation or help resources for more information on class types and their capabilities.
  
  Related Information:
  
  Class Types in SAP: Class types are used in SAP to categorize objects (like materials, equipment, etc.) and can be defined as either hierarchical or non-hierarchical.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL01 (Create Class), CL02 (Change Class), and CL03 (Display Class) for managing class types.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to class types and reclassification.
  
  If you continue to face issues, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.