Visual Studio 2017 not opening .modelproj

Question

What workload/component needs to be installed in order for Visual Studio 2017 Enterprise to open existing .modelproj (UML-based design projects)?

Answer 1

The following worked for me in Visual Studio 2017 (version 15.4.2):

1. Open Visual Studio Installer
2. Go to the tab Individual components
3. In the Code tools section tick Live Dependency Validation. Although this is a different feature, it installed the required dependencies for me.