Hi, I created a UML model diagram, added some class diagrams, sequence diagrams etc. Now, a while later, I want to edit the Visio file and suddenly I am no longer able to edit my shapes. I keep getting the message "This UML shape exists on a drawing page which is not part of a UML model diagram. This shape is designed to work in drawings created using the UML Model Diagram template."
What happened? And how can I edit my shapes again? (and add new ones)
Regards, Stefan