I'm using EVL and want to apply my own EVL file on my own model which is
built based on UML2.ECORE meta model.
But by right-clicking on this file (UML2.ecore) and selecting "Register
ECore metamodel", I get the following Error:
Registration failed. The selected file may not be a valid ECore metamodel.
Do I need to install UML2 plug-in? Or any other idea?