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java.lang.NullPointerException: 	at org.eclipse.ui.handlers.HandlerUtil.noVariableFound(HandlerUtil.java:42)	at org.eclipse.ui.handlers.HandlerUtil.getVariableChecked(HandlerUtil.java:90)	at org.eclipse.ui.handlers.HandlerUtil.getActiveWorkbenchWindowChecked(HandlerUtil.java:211)	at org.springsource.ide.eclipse.commons.quicksearch.ui.QuickSearchHandler.execute(QuickSearchHandler.java:46)	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:499)	at org.springsource.ide.eclipse.commons.ui.tips.TipInfo.invokeAction(TipInfo.java:84)	at org.springsource.ide.eclipse.commons.ui.tips.TipOfTheDayPopup$1.widgetSelected(TipOfTheDayPopup.java:123)	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4136)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1458)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1481)	at org.eclipse.swt.widgets.Widget.sendSelectionEvent(Widget.java:1531)	at org.eclipse.swt.widgets.Link.textView_clickOnLink_atIndex(Link.java:117)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5809)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:221)	at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1093)	at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1085)	at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2538)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5495)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)	at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:221)	at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2102)	at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2299)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5559)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)	at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:5004)	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5153)	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)	at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3618)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668)	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:601)	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)