How To Fix WTADDI428 - Class type &1 and class &2 cannot be exploded

SAP Error Message - Details

• Message type: E = Error

• Message class: WTADDI - Additionals: Messages

• Message number: 428

• Message text: Class type &1 and class &2 cannot be exploded

What causes this issue?

You wish to specify plants or customers using class &V2&. The system is
unable to explode this class, however, as there are no plants or
customers assigned to it.

How to fix this error?

Check whether class &V2& really does belong to class type &V1&; if not,
correct your entries.

Error message extract from SAP system. Copyright SAP SE.