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What steps will reproduce the problem? 1. Open project then open xml file -- Error Details -- Date: Thu Sep 17 09:22:38 ICT 2015 Message: Unhandled event loop exception Severity: Error Product: Eclipse 4.4.1.20140925-1820 (org.eclipse.epp.package.rcp.product) Plugin: org.eclipse.ui Session Data: eclipse.buildId=4.4.2.M20150204-1700 java.version=1.8.0_11 java.vendor=Oracle Corporation BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US Framework arguments: -product org.eclipse.epp.package.rcp.product Command-line arguments: -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.rcp.product -clean Exception Stack Trace: org.eclipse.swt.SWTError: No more handles at org.eclipse.swt.SWT.error(SWT.java:4467) at org.eclipse.swt.SWT.error(SWT.java:4356) at org.eclipse.swt.SWT.error(SWT.java:4327) at org.eclipse.swt.widgets.Widget.error(Widget.java:476) at org.eclipse.swt.widgets.Control.createHandle(Control.java:703) at org.eclipse.swt.widgets.Label.createHandle(Label.java:199) at org.eclipse.swt.widgets.Control.createWidget(Control.java:743) at org.eclipse.swt.widgets.Control.<init>(Control.java:111) at org.eclipse.swt.widgets.Label.<init>(Label.java:101) at org.eclipse.ui.texteditor.StatusLineContributionItem.fill(StatusLineContributionItem.java:182) at org.eclipse.jface.action.SubContributionItem.fill(SubContributionItem.java:61) at org.eclipse.jface.action.StatusLineManager.update(StatusLineManager.java:345) at org.eclipse.ui.internal.WorkbenchWindow.updateActionBars(WorkbenchWindow.java:2320) at org.eclipse.ui.internal.WWinActionBars.updateActionBars(WWinActionBars.java:122) at org.eclipse.ui.SubActionBars.updateActionBars(SubActionBars.java:621) at org.eclipse.wst.xml.ui.internal.tabletree.SourceEditorActionBarContributor.setActivePage(SourceEditorActionBarContributor.java:200) at org.eclipse.ui.part.MultiPageEditorActionBarContributor.setActiveEditor(MultiPageEditorActionBarContributor.java:51) at org.eclipse.wst.xml.ui.internal.tabletree.SourceEditorActionBarContributor.setActiveEditor(SourceEditorActionBarContributor.java:172) at org.eclipse.wst.xml.ui.internal.tabletree.XMLMultiPageEditorActionBarContributor.setActiveEditor(XMLMultiPageEditorActionBarContributor.java:90) at org.eclipse.ui.internal.EditorActionBars.partChanged(EditorActionBars.java:354) at org.eclipse.ui.internal.WorkbenchPage.updateActivations(WorkbenchPage.java:305) at org.eclipse.ui.internal.WorkbenchPage.access$17(WorkbenchPage.java:287) at org.eclipse.ui.internal.WorkbenchPage$E4PartListener.partActivated(WorkbenchPage.java:209) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl$3.run(PartServiceImpl.java:241) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.firePartActivated(PartServiceImpl.java:238) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:692) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.activate(PartServiceImpl.java:620) at org.eclipse.e4.ui.internal.workbench.swt.AbstractPartRenderer.activate(AbstractPartRenderer.java:106) at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$1.handleEvent(ContributedPartRenderer.java:61) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1070) at org.eclipse.swt.widgets.Shell.setActiveControl(Shell.java:1453) at org.eclipse.swt.widgets.Shell.WM_MOUSEACTIVATE(Shell.java:2334) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4654) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339) at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1626) at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2075) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method) at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2544) at org.eclipse.swt.widgets.Scrollable.callWindowProc(Scrollable.java:79) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4705) at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:339) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5036) at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:3141) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3756) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1151) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1032) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:636) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:579) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135) 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(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438)