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

WW408 - Overview

• 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.

WW408 - Details

• 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