in the old Gen toolset because of the way that Gen stores objects in the model. All of the diagrams in Gen work off a common model (set of objects, associations and properties), so if you change an object like an attribute, the effect is immediate on any other diagram that references the object. Gen also imposes very strict and rigid constraints on the model: you cannot reference a non-existent object and you cannot delete an object that is referenced.
- Change #1 in Action Diagram A
- Change #1 in Action Diagram B
- Change #2 in Action Diagram A