Resolution:
Correct the code; then recompile.
Example:
In the following example, MyAttribute references parameter A, which is also defined as a type.
       attribute-id MyAttribute.
       01 Prop1 type A property.
       method-id new (parm1 as type A).
       end method.
       end attribute.
       class-id A attribute MyAttribute(new A).
       end class.