How to use "Redefine Operation" option.

[andrewd]

I can select an operation in a component and under the "Advanced" dialog there is an option to "Redefine Operation".  When I try to press the "Add" button to use this, I get an error that there is no inheritance.  My component does have a "realize" interface from an interface object.  Does anyone know the intent of this "Redefined Operation" option?

[qwerty]

Realize is not inheritance. There must exist a Generalize relation.

q.