ava.lang.NullPointerException
	at org.jboss.tools.struts.ui.editor.model.impl.StrutsElement.updateModelModifiedProperty(StrutsElement.java:115)
	at org.jboss.tools.struts.ui.editor.model.impl.StrutsElement.setSize(StrutsElement.java:205)
	at org.jboss.tools.struts.ui.editor.model.commands.SetConstraintCommand.execute(SetConstraintCommand.java:33)
	at org.eclipse.gef.commands.CompoundCommand.execute(CompoundCommand.java:107)
	at org.eclipse.gef.commands.CommandStack.execute(CommandStack.java:149)
	at org.eclipse.gef.tools.AbstractTool.executeCommand(AbstractTool.java:388)
	at org.eclipse.gef.tools.AbstractTool.executeCurrentCommand(AbstractTool.java:400)
	at org.eclipse.gef.tools.DragEditPartsTracker.performDrag(DragEditPartsTracker.java:469)
	at org.eclipse.gef.tools.DragEditPartsTracker.handleButtonUp(DragEditPartsTracker.java:333)
	at org.eclipse.gef.tools.AbstractTool.mouseUp(AbstractTool.java:1053)
	at org.eclipse.gef.tools.SelectionTool.mouseUp(SelectionTool.java:544)
	at org.eclipse.gef.EditDomain.mouseUp(EditDomain.java:259)
	at org.eclipse.gef.ui.parts.DomainEventDispatcher.dispatchMouseReleased(DomainEventDispatcher.java:374)
	at org.eclipse.draw2d.LightweightSystem$EventHandler.mouseUp(LightweightSystem.java:538)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:137)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3180)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2856)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1930)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1894)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:422)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
	at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177)
	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.core.launcher.Main.invokeFramework(Main.java:336)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
	at org.eclipse.core.launcher.Main.run(Main.java:977)
	at org.eclipse.core.launcher.Main.main(Main.java:952)