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java.lang.NullPointerException: 	at org.zkoss.eclipse.ve.VeWebAppRuntime.(VeWebAppRuntime.java:41)	at org.zkoss.eclipse.ve.VeWebAppRuntime.newInstance(VeWebAppRuntime.java:48)	at org.zkoss.eclipse.ve.WebAppFarm.getVeWebApplication(WebAppFarm.java:147)	at org.zkoss.eclipse.ve.VeInstructionSender.send(VeInstructionSender.java:80)	at org.zkoss.eclipse.ve.model.remote.DirectVEAppController.sendInstruction(DirectVEAppController.java:280)	at org.zkoss.eclipse.ve.model.remote.DirectVEAppController.doSelect(DirectVEAppController.java:144)	at org.zkoss.eclipse.ve.ui.views.VeViewControl$3.doSuperSelect(VeViewControl.java:178)	at org.zkoss.eclipse.ve.ui.views.VeViewControl$3.doSelect(VeViewControl.java:287)	at org.zkoss.eclipse.ve.ui.views.VeViewControl$VeViewListener.onSelectionChanged(VeViewControl.java:313)	at org.zkoss.eclipse.setting.ZEditorObserver.firePostZulSelectionChanged(ZEditorObserver.java:160)	at org.zkoss.eclipse.editor.core.model.ZulContext$1.selectionChanged(ZulContext.java:88)	at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2755)	at org.eclipse.jface.text.TextViewer.firePostSelectionChanged(TextViewer.java:2703)	at org.eclipse.jface.text.TextViewer$5.run(TextViewer.java:2682)	at org.eclipse.swt.widgets.Display.timerProc(Display.java:4121)	at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)	at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2332)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3177)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1029)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:923)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)	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:353)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)	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:616)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)	at org.eclipse.equinox.launcher.Main.run(Main.java:1438)	at org.eclipse.equinox.launcher.Main.main(Main.java:1414)