How to fix 'WindowBuilder encountered unexpected internal error' when using GWT Designer View

📅 Published 15.03.2014
🏷️ Operating Systems
'WindowBuilder encountered unexpected internal error' is an issue encountered by many in Eclipse Kepler using GWT SDK 2.6.0. Problem relates to GWT SDK 2.6.0. You'll need to remove GWT SDK...

'WindowBuilder encountered unexpected internal error' is an issue encountered by many in Eclipse Kepler using GWT SDK 2.6.0. Problem relates to GWT SDK 2.6.0. You'll need to remove GWT SDK 2.6.0 from Web Toolkit path in Eclipse Kepler, otherwise your xml files won't open in WindowBuilder in Eclipse. You'll get all kinds of non-descriptive errors (see the stack trace below).

The only way to fix the problem (atleast for me) was to download the older 2.5.1 SDK from GWT downloads page (https://google-web-toolkit.googlecode.com/files/gwt-2.5.1.zip) then unzip it and put it in a file system and then reference it in Eclipse - Project Properties - Google - Web Toolkit - Configure SDKs, as per the following screenshot.

3-15-2014 4-07-22 PM

I've tried to download 2.6.0 as well and also move it onto a short path, but that didn't work. Only downgrading to GWT SDK 2.5.1 fixed the problem for me.

Stack trace:

java.lang.NoSuchMethodError: com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(Lcom/google/gwt/core/ext/TreeLogger;Ljava/lang/String;Z)Lcom/google/gwt/dev/cfg/ModuleDef;
	at com.google.gwt.dev.shell.designtime.HostedModeSupportImpl.loadModule(HostedModeSupportImpl.java:85)
	at com.google.gwt.dev.shell.designtime.HostedModeSupportImpl.createModuleSpaceHost(HostedModeSupportImpl.java:64)
	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.wb.internal.core.utils.reflect.ReflectionUtils.invokeMethod(ReflectionUtils.java:869)
	at com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.createModuleSpaceHost(HostedModeSupport.java:447)
	at com.google.gwt.dev.shell.designtime.ModuleSpace.<init>(ModuleSpace.java:60)
	at com.google.gdt.eclipse.designer.webkit.jsni.ModuleSpaceWebKit.<init>(ModuleSpaceWebKit.java:45)
	at com.google.gdt.eclipse.designer.webkit.BrowserShellWebKit.setUrl(BrowserShellWebKit.java:85)
	at com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.startup(HostedModeSupport.java:184)
	at com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize0(GwtState.java:248)
	at com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize(GwtState.java:206)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createGWTState(UiBinderContext.java:467)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createProjectClassLoader(UiBinderContext.java:328)
	at org.eclipse.wb.internal.core.xml.model.EditorContext.createClassLoader(EditorContext.java:146)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createClassLoader(UiBinderContext.java:285)
	at org.eclipse.wb.internal.core.xml.model.EditorContext.initialize(EditorContext.java:100)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderParser.parse(UiBinderParser.java:105)
	at com.google.gdt.eclipse.designer.uibinder.editor.UiBinderDesignPage.parse(UiBinderDesignPage.java:56)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:451)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.access$2(XmlDesignPage.java:443)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage$7$1.run(XmlDesignPage.java:417)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4688)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage$7.run(XmlDesignPage.java:414)
	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
	at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF_withProgress(XmlDesignPage.java:435)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:388)
	at org.eclipse.wb.internal.core.xml.editor.UndoManager.refreshDesignerEditor(UndoManager.java:252)
	at org.eclipse.wb.internal.core.xml.editor.UndoManager.activate(UndoManager.java:85)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.setActive(XmlDesignPage.java:171)
	at org.eclipse.wb.internal.core.xml.editor.AbstractXmlEditor.pageChange(AbstractXmlEditor.java:652)
	at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:292)
	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.Widget.sendEvent(Widget.java:1057)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:778)
	at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3080)
	at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1772)
	at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:279)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4170)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	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:354)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
	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:636)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1426)

Full context stack trace:

java.lang.NoSuchMethodError: com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath(Lcom/google/gwt/core/ext/TreeLogger;Ljava/lang/String;Z)Lcom/google/gwt/dev/cfg/ModuleDef;
	at com.google.gwt.dev.shell.designtime.HostedModeSupportImpl.loadModule(HostedModeSupportImpl.java:85)
	at com.google.gwt.dev.shell.designtime.HostedModeSupportImpl.createModuleSpaceHost(HostedModeSupportImpl.java:64)
	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.wb.internal.core.utils.reflect.ReflectionUtils.invokeMethod(ReflectionUtils.java:869)
	at com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.createModuleSpaceHost(HostedModeSupport.java:447)
	at com.google.gwt.dev.shell.designtime.ModuleSpace.<init>(ModuleSpace.java:60)
	at com.google.gdt.eclipse.designer.webkit.jsni.ModuleSpaceWebKit.<init>(ModuleSpaceWebKit.java:45)
	at com.google.gdt.eclipse.designer.webkit.BrowserShellWebKit.setUrl(BrowserShellWebKit.java:85)
	at com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.startup(HostedModeSupport.java:184)
	at com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize0(GwtState.java:248)
	at com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize(GwtState.java:206)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createGWTState(UiBinderContext.java:467)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createProjectClassLoader(UiBinderContext.java:328)
	at org.eclipse.wb.internal.core.xml.model.EditorContext.createClassLoader(EditorContext.java:146)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createClassLoader(UiBinderContext.java:285)
	at org.eclipse.wb.internal.core.xml.model.EditorContext.initialize(EditorContext.java:100)
	at com.google.gdt.eclipse.designer.uibinder.parser.UiBinderParser.parse(UiBinderParser.java:105)
	at com.google.gdt.eclipse.designer.uibinder.editor.UiBinderDesignPage.parse(UiBinderDesignPage.java:56)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:451)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.access$2(XmlDesignPage.java:443)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage$7$1.run(XmlDesignPage.java:417)
	at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180)
	at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150)
	at org.eclipse.swt.widgets.Display.syncExec(Display.java:4688)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage$7.run(XmlDesignPage.java:414)
	at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
	at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF_withProgress(XmlDesignPage.java:435)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:388)
	at org.eclipse.wb.internal.core.xml.editor.UndoManager.refreshDesignerEditor(UndoManager.java:252)
	at org.eclipse.wb.internal.core.xml.editor.UndoManager.activate(UndoManager.java:85)
	at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.setActive(XmlDesignPage.java:171)
	at org.eclipse.wb.internal.core.xml.editor.AbstractXmlEditor.pageChange(AbstractXmlEditor.java:652)
	at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:292)
	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.Widget.sendEvent(Widget.java:1057)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1081)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:778)
	at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3080)
	at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1772)
	at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:279)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1057)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4170)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:140)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:611)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	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:354)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181)
	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:636)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1450)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1426)