Diagnosis
No unique class assignment could be determined.

System Response
As SAP APO currently supports only simple classification for the CDP(Characteristics Dependent Planning) classification system, no materialclass will be transferred for this material.
If you have set the ERP classification system as the classificationsystem in SAP APO you can ignore this message.

Procedure
Ensure that all classes used in the material master have the same name.If necessary, change the names.