The Version Files utility allows you to set the VersionFile for versionable elements like Namespaces and Diagrams. This utility sets the VersionFile property to ensure that the element is unique within the model.
Note: The element with a version file name specified holds all the elements in this domain that do not have the version file name specified.
To invoke the Set Version Files utility, perform the following:
Open a System Modeler project in Visual Studio.
Select the model in the Class View.
On the Tools menu, select System Modeler Tools, and then click Set Version Files menu item to open the Set Version Files Wizard.