java.lang.ClassCastException: org.eclipse.uml2.uml.internal.impl.ModelImpl cannot be cast to org.eclipse.emf.ecore.EPackage
	at org.eclipse.ocl.examples.xtext.completeocl.ui.commands.LoadCompleteOCLResourceHandler$ResourceDialog.processResources(LoadCompleteOCLResourceHandler.java:281)
	at org.eclipse.emf.common.ui.dialogs.ResourceDialog.okPressed(ResourceDialog.java:372)
	at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:476)
	at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:628)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4164)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1466)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1489)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1474)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4010)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3649)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:826)
	at org.eclipse.jface.window.Window.open(Window.java:802)
	at org.eclipse.ocl.examples.xtext.completeocl.ui.commands.LoadCompleteOCLResourceHandler$ResourceDialog.open(LoadCompleteOCLResourceHandler.java:244)
	at org.eclipse.ocl.examples.xtext.completeocl.ui.commands.LoadCompleteOCLResourceHandler.execute(LoadCompleteOCLResourceHandler.java:317)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:76)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:212)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:204)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:840)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.handleWidgetSelection(HandledContributionItem.java:733)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.access$7(HandledContributionItem.java:717)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$4.handleEvent(HandledContributionItem.java:652)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4164)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1466)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1489)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1474)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4010)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3649)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1108)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:992)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:137)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:600)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:555)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:354)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:636)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1450)