Exception in thread "main" org.eclipse.emf.ecore.resource.Resource$IOWrappedException: The object 'model.impl.FormImpl@273686 (_id: 3, _name: formulaire_add)' is not contained in a resource.
at org.eclipse.emf.ecore.xmi.impl.XMLSaveImpl.endSave(XMLSaveImpl.java:306)
at org.eclipse.emf.ecore.xmi.impl.XMLSaveImpl.save(XMLSaveImpl.java:235)
at org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.doSave(XMLResourceImpl.java:254)
at org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl.save(XMLResourceImpl.java:229)
at org.eclipse.emf.compare.util.ModelUtils.serialize(ModelUtils.java:429)
at model.test.Compare.main(Compare.java:97)