NullPointerException with Camunda Modeler

Tried to use KIELER Layout for Graphiti with Camunda Modeler (http://www.camunda.org/features/modeler.html) but I get an NullPointerException (see Details below).

I tried to solve it by myself, but to be honest I did not really understand the whole Graphiti concept. At least I guess I tracked down the problem to the function calcInsets. Seems like that in some way the function relies on the GraphicAlgorithm tree whereas it should use the Shapes tree. But just a rough as, as I need did understand the whole concept.

!ENTRY de.cau.cs.kieler.kiml.ui 4 0 2014-01-21 19:03:50.446
!MESSAGE Error in monitored operation
!STACK 0
java.lang.NullPointerException
at de.cau.cs.kieler.kiml.graphiti.KimlGraphitiUtil.calcInsets(KimlGraphitiUtil.java:371)
at de.cau.cs.kieler.kiml.graphiti.GraphitiDiagramLayoutManager.createNode(GraphitiDiagramLayoutManager.java:251)
at de.cau.cs.kieler.kiml.graphiti.GraphitiDiagramLayoutManager.buildLayoutGraphRecursively(GraphitiDiagramLayoutManager.java:229)
at de.cau.cs.kieler.kiml.graphiti.GraphitiDiagramLayoutManager.buildLayoutGraph(GraphitiDiagramLayoutManager.java:171)
at de.cau.cs.kieler.kiml.ui.diagram.DiagramLayoutEngine$1.preUIexec(DiagramLayoutEngine.java:183)
at de.cau.cs.kieler.kiml.ui.util.MonitoredOperation.runUnmonitored(MonitoredOperation.java:186)
at de.cau.cs.kieler.kiml.ui.util.MonitoredOperation.runUnmonitored(MonitoredOperation.java:170)
at de.cau.cs.kieler.kiml.ui.diagram.DiagramLayoutEngine.layout(DiagramLayoutEngine.java:237)
at de.cau.cs.kieler.kiml.ui.diagram.DiagramLayoutEngine.layout(DiagramLayoutEngine.java:127)
at de.cau.cs.kieler.kiml.ui.diagram.DiagramLayoutEngine.layout(DiagramLayoutEngine.java:93)
at de.cau.cs.kieler.kiml.ui.diagram.LayoutHandler.execute(LayoutHandler.java:72)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)
at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:243)
at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:224)
at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:167)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:850)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.handleWidgetSelection(HandledContributionItem.java:743)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.access$7(HandledContributionItem.java:727)
at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$4.handleEvent(HandledContributionItem.java:662)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4170)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:138)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:610)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
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:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
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)
at org.eclipse.equinox.launcher.Main.main(Main.java:1426)