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Cannot resolve execution environment for the project runtime.n4 of type RUNTIME_LIBRARY
java.lang.RuntimeException: Cannot resolve execution environment for the project runtime.n4 of type RUNTIME_LIBRARY	at eu.numberfour.ide.runner.RuntimeEnvironmentsHelper.findProjectEnvironments(RuntimeEnvironmentsHelper.java:55)	at eu.numberfour.ide.runner.ui.SupportingRunnerPropertyTester.resolveRequiredEnvironments(SupportingRunnerPropertyTester.java:168)	at eu.numberfour.ide.runner.ui.SupportingRunnerPropertyTester.resolveRequiredEnvironments(SupportingRunnerPropertyTester.java:140)	at eu.numberfour.ide.runner.ui.SupportingRunnerPropertyTester.dipatchResolveRequiredEnvironments(SupportingRunnerPropertyTester.java:124)	at eu.numberfour.ide.runner.ui.SupportingRunnerPropertyTester.test(SupportingRunnerPropertyTester.java:82)	at org.eclipse.core.internal.expressions.Property.test(Property.java:58)	at org.eclipse.core.internal.expressions.TestExpression.evaluate(TestExpression.java:99)	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)	at org.eclipse.core.internal.expressions.AndExpression.evaluate(AndExpression.java:29)	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)	at org.eclipse.core.internal.expressions.IterateExpression.evaluate(IterateExpression.java:150)	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)	at org.eclipse.core.internal.expressions.WithExpression.evaluate(WithExpression.java:72)	at org.eclipse.core.internal.expressions.CompositeExpression.evaluateAnd(CompositeExpression.java:53)	at org.eclipse.core.internal.expressions.EnablementExpression.evaluate(EnablementExpression.java:53)	at org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutExtension.evalEnablementExpression(LaunchShortcutExtension.java:281)	at org.eclipse.debug.ui.actions.ContextualLaunchAction.isApplicable(ContextualLaunchAction.java:287)	at org.eclipse.debug.ui.actions.ContextualLaunchAction.fillMenu(ContextualLaunchAction.java:218)	at org.eclipse.debug.ui.actions.ContextualLaunchAction$1.menuShown(ContextualLaunchAction.java:141)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:255)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4199)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1467)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1490)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1475)	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1279)	at org.eclipse.jface.action.ActionContributionItem.copyMenu(ActionContributionItem.java:1276)	at org.eclipse.jface.action.ActionContributionItem.handleShowProxy(ActionContributionItem.java:1256)	at org.eclipse.jface.action.ActionContributionItem.access$4(ActionContributionItem.java:1245)	at org.eclipse.jface.action.ActionContributionItem$8.handleEvent(ActionContributionItem.java:1218)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4199)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1467)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1490)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1471)	at org.eclipse.swt.widgets.Menu.menuWillOpen(Menu.java:806)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5692)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)	at org.eclipse.swt.internal.cocoa.NSMenu.popUpContextMenu(NSMenu.java:77)	at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:278)	at org.eclipse.swt.widgets.Display.runPopups(Display.java:4119)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3662)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at eu.numberfour.ide.product.N4Application.start(N4Application.java:137)	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:497)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)	at org.eclipse.equinox.launcher.Main.main(Main.java:1438)