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java.lang.NullPointerException
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java.lang.NullPointerException
java.lang.NullPointerException: 	at de.walware.ecommons.ui.mpbv.PageBookBrowserPage.setFocusToBrowser(PageBookBrowserPage.java:376)	at de.walware.ecommons.ui.mpbv.PageBookBrowserPage.setDefaultFocus(PageBookBrowserPage.java:368)	at de.walware.ecommons.ui.mpbv.PageBookBrowserPage$1.setFocus(PageBookBrowserPage.java:232)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer$2.setFocus(ContributedPartRenderer.java:105)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.custom.CTabFolder.setFocus(CTabFolder.java:2614)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Composite.setFocus(Composite.java:1513)	at org.eclipse.swt.widgets.Control.fixFocus(Control.java:217)	at org.eclipse.swt.widgets.Control.setEnabled(Control.java:4567)	at org.eclipse.ui.internal.WorkbenchWindow.disableControl(WorkbenchWindow.java:2113)	at org.eclipse.ui.internal.WorkbenchWindow.run(WorkbenchWindow.java:2160)	at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:293)	at org.eclipse.ui.internal.SaveableHelper.runProgressMonitorOperation(SaveableHelper.java:271)	at org.eclipse.ui.internal.SaveableHelper.saveModels(SaveableHelper.java:213)	at org.eclipse.ui.internal.SaveableHelper.savePart(SaveableHelper.java:148)	at org.eclipse.ui.internal.WorkbenchPage.saveSaveable(WorkbenchPage.java:3904)	at org.eclipse.ui.internal.WorkbenchPage.saveEditor(WorkbenchPage.java:3918)	at org.eclipse.ui.internal.handlers.SaveHandler.execute(SaveHandler.java:54)	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:295)	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:54)	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:282)	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:264)	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:152)	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:494)	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:488)	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:210)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.executeCommand(KeyBindingDispatcher.java:286)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.press(KeyBindingDispatcher.java:507)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.processKeyEvent(KeyBindingDispatcher.java:558)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.filterKeySequenceBindings(KeyBindingDispatcher.java:378)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher.access$0(KeyBindingDispatcher.java:324)	at org.eclipse.e4.ui.bindings.keys.KeyBindingDispatcher$KeyDownFilter.handleEvent(KeyBindingDispatcher.java:86)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1605)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1339)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1366)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1349)	at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1378)	at org.eclipse.swt.widgets.Widget.gtk_key_press_event(Widget.java:764)	at org.eclipse.swt.widgets.Control.gtk_key_press_event(Control.java:3457)	at org.eclipse.swt.widgets.Composite.gtk_key_press_event(Composite.java:801)	at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:2000)	at org.eclipse.swt.widgets.Control.windowProc(Control.java:5819)	at org.eclipse.swt.widgets.Display.windowProc(Display.java:5490)	at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)	at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9545)	at org.eclipse.swt.widgets.Display.eventProc(Display.java:1275)	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:2495)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4141)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:687)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)	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:388)	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)	at org.eclipse.equinox.launcher.Main.run(Main.java:1519)	at org.eclipse.equinox.launcher.Main.main(Main.java:1492)