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com.atlassw.tools.eclipse.checkstyle.util.CheckstylePluginException: Unknown file format: 1.2.0	at com.atlassw.tools.eclipse.checkstyle.projectconfig.ProjectConfigurationFactory$ProjectConfigFileHandler.startElement(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)	at javax.xml.parsers.SAXParser.parse(Unknown Source)	at javax.xml.parsers.SAXParser.parse(Unknown Source)	at com.atlassw.tools.eclipse.checkstyle.util.XMLUtil.parseWithSAX(Unknown Source)	at com.atlassw.tools.eclipse.checkstyle.util.XMLUtil.parseWithSAX(Unknown Source)	at com.atlassw.tools.eclipse.checkstyle.projectconfig.ProjectConfigurationFactory.loadFromPersistence(Unknown Source)	at com.atlassw.tools.eclipse.checkstyle.projectconfig.ProjectConfigurationFactory.getConfiguration(Unknown Source)	at com.atlassw.tools.eclipse.checkstyle.properties.CheckstylePropertyPage.initialize(Unknown Source)	at com.atlassw.tools.eclipse.checkstyle.properties.CheckstylePropertyPage.createContents(Unknown Source)	at org.eclipse.jface.preference.PreferencePage.createControl(PreferencePage.java:232)	at org.eclipse.jface.preference.PreferenceDialog.createPageControl(PreferenceDialog.java:1371)	at org.eclipse.jface.preference.PreferenceDialog$12.run(PreferenceDialog.java:1138)	at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)	at org.eclipse.core.runtime.Platform.run(Platform.java:783)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148)	at org.eclipse.jface.preference.PreferenceDialog.showPage(PreferenceDialog.java:1132)	at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.showPage(FilteredPreferenceDialog.java:351)	at org.eclipse.jface.preference.PreferenceDialog$8.selectionChanged(PreferenceDialog.java:638)	at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:763)	at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)	at org.eclipse.core.runtime.Platform.run(Platform.java:783)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148)	at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:761)	at org.eclipse.jface.viewers.StructuredViewer.handlePostSelect(StructuredViewer.java:1042)	at org.eclipse.jface.viewers.StructuredViewer$5.widgetSelected(StructuredViewer.java:1062)	at org.eclipse.jface.util.OpenStrategy.firePostSelectionEvent(OpenStrategy.java:231)	at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:226)	at org.eclipse.jface.util.OpenStrategy$3.run(OpenStrategy.java:392)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3102)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2761)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:809)	at org.eclipse.jface.window.Window.open(Window.java:787)	at org.eclipse.ui.dialogs.PropertyDialogAction.run(PropertyDialogAction.java:157)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:996)	at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:538)	at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:488)	at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:400)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3125)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2758)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)	at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)	at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)	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.core.launcher.Main.invokeFramework(Main.java:334)	at org.eclipse.core.launcher.Main.basicRun(Main.java:278)	at org.eclipse.core.launcher.Main.run(Main.java:973)	at org.eclipse.core.launcher.Main.main(Main.java:948)