Diagram generation is plagued by the same problems as the "Rational Rose" fantasy of automatic code generation from diagrams: trivial applications are trivial to diagram, and non-trivial ones defy it, as the complexity (dependencies tend to form dense, multiply connected graphs in these applications) quickly outstrips any straightforward mapping to a visual representation.
I wouldn't use these tools anyway, to be honest. They have some limited utility when constrained to small components/parts of an application (e.g., self-contained libraries), but for understanding systems as a whole there is too much to have effective reverse-engineering into a visualization (in my opinion).
I wouldn't use these tools anyway, to be honest. They have some limited utility when constrained to small components/parts of an application (e.g., self-contained libraries), but for understanding systems as a whole there is too much to have effective reverse-engineering into a visualization (in my opinion).