Hello, I love yUML idea. I start to used within yUML macro and I just failed on a bug: In a page I put 2 UML diagrams, one use case diagram and one class diagram. For class diagram I don't set type parameter as is it class by default. I start to write class diagram: it is correctly generated Then I add before shit class diagram a use case diagram: it is also correctly generated. But following class diagram becomes use case diagram The work around was to add type parameter on my class diagram. Regards, Arnaud.