Hello,

I wanted to start working with the GWT Designer.
At the Beginning it worked in one project very well in my Eclipse
Version 3.6.2.
But in an another (maven) project, I get the following error:

WindowBuilder internal error

WindowBuilder encountered unexpected internal error. Please contact
support.

java.lang.NoSuchMethodError:
com.google.gwt.dev.javac.CompilationState.getTypeOracle()Lcom/google/
gwt/dev/javac/typemodel/TypeOracle;



Show stack trace.
Hide stack trace.

Stack trace:
java.lang.NoSuchMethodError:
com.google.gwt.dev.javac.CompilationState.getTypeOracle()Lcom/google/
gwt/dev/javac/typemodel/TypeOracle;
        at
com.google.gwt.dev.shell.designtime.HostedModeSupportImpl.createModuleSpaceHost(HostedModeSupportImpl.java:
68)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils.invokeMethod(ReflectionUtils.java:
836)
        at
com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.createModuleSpaceHost(HostedModeSupport.java:
316)
        at
com.google.gwt.dev.shell.designtime.ModuleSpace.<init>(ModuleSpace.java:
59)
        at
com.google.gdt.eclipse.designer.ie.jsni.ModuleSpaceIE.<init>(ModuleSpaceIE.java:
152)
        at
com.google.gdt.eclipse.designer.ie.BrowserShellIE.setUrl(BrowserShellIE.java:
106)
        at
com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.startup(HostedModeSupport.java:
125)
        at
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize0(GwtState.java:
255)
        at
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize(GwtState.java:
219)
        at
com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createGWTState(UiBinderContext.java:
389)
        at
com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createProjectClassLoader(UiBinderContext.java:
247)
        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:
230)
        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:
89)
        at
com.google.gdt.eclipse.designer.uibinder.editor.UiBinderDesignPage.parse(UiBinderDesignPage.java:
93)
        at
org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:
408)
        at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.access
$2(XmlDesignPage.java:400)
        at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage
$7$1.run(XmlDesignPage.java:374)
        at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:
179)
        at
org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:
150)
        at org.eclipse.swt.widgets.Display.syncExec(Display.java:4584)
        at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage
$7.run(XmlDesignPage.java:371)
        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:
392)
        at
org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:
345)
        at
org.eclipse.wb.internal.core.xml.editor.UndoManager.refreshDesignerEditor(UndoManager.java:
229)
        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:
164)
        at
org.eclipse.wb.internal.core.xml.editor.AbstractXmlEditor.pageChange(AbstractXmlEditor.java:
328)
        at org.eclipse.ui.part.MultiPageEditorPart
$2.widgetSelected(MultiPageEditorPart.java:290)
        at
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:
234)
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
        at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
        at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:
2743)
        at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1429)
        at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:
257)
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
        at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:
4066)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
        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(NativeMethodAccessorImpl.java:
39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1408)

Full context stack trace:
java.lang.NoSuchMethodError:
com.google.gwt.dev.javac.CompilationState.getTypeOracle()Lcom/google/
gwt/dev/javac/typemodel/TypeOracle;
        at
com.google.gwt.dev.shell.designtime.HostedModeSupportImpl.createModuleSpaceHost(HostedModeSupportImpl.java:
68)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at
org.eclipse.wb.internal.core.utils.reflect.ReflectionUtils.invokeMethod(ReflectionUtils.java:
836)
        at
com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.createModuleSpaceHost(HostedModeSupport.java:
316)
        at
com.google.gwt.dev.shell.designtime.ModuleSpace.<init>(ModuleSpace.java:
59)
        at
com.google.gdt.eclipse.designer.ie.jsni.ModuleSpaceIE.<init>(ModuleSpaceIE.java:
152)
        at
com.google.gdt.eclipse.designer.ie.BrowserShellIE.setUrl(BrowserShellIE.java:
106)
        at
com.google.gdt.eclipse.designer.hosted.tdt.HostedModeSupport.startup(HostedModeSupport.java:
125)
        at
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize0(GwtState.java:
255)
        at
com.google.gdt.eclipse.designer.model.widgets.support.GwtState.initialize(GwtState.java:
219)
        at
com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createGWTState(UiBinderContext.java:
389)
        at
com.google.gdt.eclipse.designer.uibinder.parser.UiBinderContext.createProjectClassLoader(UiBinderContext.java:
247)
        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:
230)
        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:
89)
        at
com.google.gdt.eclipse.designer.uibinder.editor.UiBinderDesignPage.parse(UiBinderDesignPage.java:
93)
        at
org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:
408)
        at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.access
$2(XmlDesignPage.java:400)
        at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage
$7$1.run(XmlDesignPage.java:374)
        at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:
179)
        at
org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:
150)
        at org.eclipse.swt.widgets.Display.syncExec(Display.java:4584)
        at org.eclipse.wb.internal.core.xml.editor.XmlDesignPage
$7.run(XmlDesignPage.java:371)
        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:
392)
        at
org.eclipse.wb.internal.core.xml.editor.XmlDesignPage.internal_refreshGEF(XmlDesignPage.java:
345)
        at
org.eclipse.wb.internal.core.xml.editor.UndoManager.refreshDesignerEditor(UndoManager.java:
229)
        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:
164)
        at
org.eclipse.wb.internal.core.xml.editor.AbstractXmlEditor.pageChange(AbstractXmlEditor.java:
328)
        at org.eclipse.ui.part.MultiPageEditorPart
$2.widgetSelected(MultiPageEditorPart.java:290)
        at
org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:
234)
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
        at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
        at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:
2743)
        at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1429)
        at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:
257)
        at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
        at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
        at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:
4066)
        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
        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(NativeMethodAccessorImpl.java:
39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1408)


yes, I know it is very long :)

Do you hav any idea, what the problem is.
I've searched for this Error but found nothing in relation with the
GWT Designer.
I use the gwt 2.1.1 Version.

I would be very happy, if anyone can help me.

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