Diagnosis
You are entering a class item anc have entered a class of class typeV1. an indicator in (class type) defines whether classes of thisclass type can be used for configurable objects. (such as BOMs androutings).
As you are processing a configurable BOM and the indicator is not setfor class type &V1&, you cannot enter a class item with this classtype.

Procedure
You can only enter classes of a class type which is supported forconfigurable objects.