I would like to know, whether it is possible to convert a VP 3.* UML 1.x project into a UML 2.0 project with VP 4.0/VP4.1. Exporting the old project to XMI and importing it into a new UML 2.0 project does not help since this destroys all the relations between the classes in my model. The relations just appear as diamond-boxes with strange self-references. The list of relations in the imported class is not correct anymore.
In the current version of VP-UML, you can convert the UML 1.x project into UML 2.0 through XMI import & export. But please note that there are differences between UML 1.x and 2.0 and some model & attributes will be lost after conversion. If you have any further questions, please feel free to contact us again.