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java.lang.IllegalStateException: Preference node "org.eclipse.wst.validation" has been removed.	at org.eclipse.core.internal.preferences.EclipsePreferences.checkRemoved(EclipsePreferences.java:157)	at org.eclipse.core.internal.preferences.EclipsePreferences.internalGet(EclipsePreferences.java:513)	at org.eclipse.core.internal.preferences.EclipsePreferences.getInt(EclipsePreferences.java:463)	at org.eclipse.wst.validation.internal.PreferencesWrapper$PreferencesWrapperPersistent.getInt(PreferencesWrapper.java:124)	at org.eclipse.wst.validation.internal.ValPrefManagerProject.loadProjectPreferences(ValPrefManagerProject.java:204)	at org.eclipse.wst.validation.internal.ValManager.getProjectPreferences(ValManager.java:611)	at org.eclipse.wst.validation.internal.ValManager.getProjectPreferences(ValManager.java:592)	at org.eclipse.wst.validation.ValidationFramework.getProjectSettings(ValidationFramework.java:298)	at org.eclipse.wst.sse.ui.internal.reconcile.validator.ValidatorStrategy.setDocument(ValidatorStrategy.java:315)	at org.eclipse.wst.sse.ui.internal.reconcile.DocumentRegionProcessor.setDocument(DocumentRegionProcessor.java:328)	at org.eclipse.wst.sse.ui.internal.reconcile.StructuredRegionProcessor.setDocument(StructuredRegionProcessor.java:288)	at org.eclipse.wst.sse.ui.internal.reconcile.DirtyRegionProcessor.handleInputDocumentChanged(DirtyRegionProcessor.java:559)	at org.eclipse.wst.sse.ui.internal.reconcile.DirtyRegionProcessor$TextInputListener.inputDocumentChanged(DirtyRegionProcessor.java:174)	at org.eclipse.jface.text.TextViewer.fireInputDocumentChanged(TextViewer.java:2884)	at org.eclipse.jface.text.TextViewer.setDocument(TextViewer.java:2933)	at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:629)	at org.eclipse.jface.text.source.projection.ProjectionViewer.setDocument(ProjectionViewer.java:376)	at org.eclipse.wst.sse.ui.internal.StructuredTextViewer.setDocument(StructuredTextViewer.java:796)	at org.eclipse.php.internal.ui.editor.PHPStructuredTextViewer.setDocument(PHPStructuredTextViewer.java:638)	at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:584)	at org.eclipse.ui.texteditor.AbstractTextEditor.initializeSourceViewer(AbstractTextEditor.java:3873)	at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:3401)	at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:53)	at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.createPartControl(AbstractDecoratedTextEditor.java:432)	at org.eclipse.wst.sse.ui.StructuredTextEditor.createPartControl(StructuredTextEditor.java:1453)	at org.eclipse.php.internal.ui.editor.PHPStructuredEditor.createPartControl(PHPStructuredEditor.java:2246)	at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:670)	at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:465)	at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)	at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:289)	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2863)	at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2768)	at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2760)	at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2711)	at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2707)	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2691)	at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2682)	at org.eclipse.dltk.internal.ui.editor.EditorUtility.openInEditor(EditorUtility.java:405)	at org.eclipse.dltk.internal.ui.editor.EditorUtility.openInEditor(EditorUtility.java:166)	at org.eclipse.php.internal.ui.actions.OpenActionUtil.open(OpenActionUtil.java:54)	at org.eclipse.php.internal.ui.actions.OpenAction.run(OpenAction.java:177)	at org.eclipse.php.internal.ui.actions.OpenAction.run(OpenAction.java:151)	at org.eclipse.php.internal.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:190)	at org.eclipse.php.internal.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:168)	at org.eclipse.php.internal.ui.actions.PHPExplorerActionGroup.handleOpen(PHPExplorerActionGroup.java:144)	at org.eclipse.dltk.internal.ui.scriptview.ScriptExplorerPart$4.open(ScriptExplorerPart.java:667)	at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:845)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)	at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:843)	at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1131)	at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1235)	at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:264)	at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:258)	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:298)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)	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:369)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)	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:619)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574)	at org.eclipse.equinox.launcher.Main.run(Main.java:1407)	at org.eclipse.equinox.launcher.Main.main(Main.java:1383)