java.lang.NoClassDefFoundError: Could not initialize class de.cau.cs.kieler.klighd.KlighdDataManager

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Could not initialize class de.cau.cs.kieler.klighd.KlighdDataManager

java.lang.NoClassDefFoundError: Could not initialize class de.cau.cs.kieler.klighd.KlighdDataManager	at de.cau.cs.kieler.klighd.ui.internal.handlers.KlighdActionExecutionHandler$IActionParameterValueConverter.convertToObject(KlighdActionExecutionHandler.java:163)	at org.eclipse.ui.internal.commands.ParameterValueConverterProxy.convertToObject(ParameterValueConverterProxy.java:63)	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.convertParameterValue(HandlerServiceImpl.java:140)	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.addParms(HandlerServiceImpl.java:117)	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.canExecute(HandlerServiceImpl.java:174)	at org.eclipse.e4.ui.workbench.renderers.swt.MenuManagerRendererFilter.updateElementVisibility(MenuManagerRendererFilter.java:217)	at org.eclipse.e4.ui.workbench.renderers.swt.MenuManagerShowProcessor.showMenu(MenuManagerShowProcessor.java:230)	at org.eclipse.e4.ui.workbench.renderers.swt.MenuManagerShowProcessor.menuAboutToHide(MenuManagerShowProcessor.java:110)	at org.eclipse.jface.internal.MenuManagerEventHelper.showEventPostHelper(MenuManagerEventHelper.java:92)	at org.eclipse.jface.action.MenuManager.handleAboutToShow(MenuManager.java:467)	at org.eclipse.jface.action.MenuManager.access$1(MenuManager.java:461)	at org.eclipse.jface.action.MenuManager$2.menuShown(MenuManager.java:493)	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:4481)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1329)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1353)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1334)	at org.eclipse.swt.widgets.Menu._setVisible(Menu.java:198)	at org.eclipse.swt.widgets.Display.runPopups(Display.java:3861)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3420)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)	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:498)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)	at org.eclipse.equinox.launcher.Main.run(Main.java:1515)	at org.eclipse.equinox.launcher.Main.main(Main.java:1488)