Hi! I'm having problems while configuring the GWT App Engine in eclipse. I go to preferences -> Google -> App Engine -> Add... and when I enter the directory, I got an error message "Failed to initialize App Engine SDK at c:\java\gwt-2.5.0"
In Eclipse's error log I see the following stacktrace: java.lang.NoClassDefFoundError: com/google/appengine/tools/admin/AdminException at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Unknown Source) at java.lang.Class.getConstructor0(Unknown Source) at java.lang.Class.newInstance0(Unknown Source) at java.lang.Class.newInstance(Unknown Source) at com.google.appengine.eclipse.core.sdk.AppEngineBridgeFactory.createBridge(AppEngineBridgeFactory.java:183) at com.google.appengine.eclipse.core.sdk.AppEngineBridgeFactory.createBridge(AppEngineBridgeFactory.java:121) at com.google.appengine.eclipse.core.sdk.AppEngineBridgeFactory.getAppEngineBridge(AppEngineBridgeFactory.java:94) at com.google.appengine.eclipse.core.sdk.GaeSdk.getAppEngineBridge(GaeSdk.java:287) at com.google.appengine.eclipse.core.sdk.GaeSdk.validate(GaeSdk.java:460) at com.google.gdt.eclipse.core.ui.AddSdkDialog.validateSdk(AddSdkDialog.java:273) at com.google.gdt.eclipse.core.ui.AddSdkDialog.validate(AddSdkDialog.java:213) at com.google.gdt.eclipse.core.ui.AddSdkDialog$3.focusLost(AddSdkDialog.java:171) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:143) 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:1058) at org.eclipse.swt.widgets.Control.sendFocusEvent(Control.java:2822) at org.eclipse.swt.widgets.Widget.wmKillFocus(Widget.java:1921) at org.eclipse.swt.widgets.Control.WM_KILLFOCUS(Control.java:4900) at org.eclipse.swt.widgets.Control.windowProc(Control.java:4562) at org.eclipse.swt.widgets.Text.windowProc(Text.java:2254) at org.eclipse.swt.widgets.Display.windowProc(Display.java:4985) at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method) at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:3114) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3749) at org.eclipse.jface.window.Window.runEventLoop(Window.java:825) at org.eclipse.jface.window.Window.open(Window.java:801) at com.google.appengine.eclipse.core.preferences.ui.GaePreferencePage$1.doAddSdk(GaePreferencePage.java:90) at com.google.gdt.eclipse.core.ui.SdkTable$3.widgetSelected(SdkTable.java:242) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:240) 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:4165) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754) at org.eclipse.jface.window.Window.runEventLoop(Window.java:825) at org.eclipse.jface.window.Window.open(Window.java:801) at org.eclipse.ui.internal.dialogs.WorkbenchPreferenceDialog.open(WorkbenchPreferenceDialog.java:215) at org.eclipse.ui.internal.handlers.ShowPreferencePageHandler.execute(ShowPreferencePageHandler.java:54) at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293) at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476) at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508) at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169) at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241) at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:157) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411) 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:4165) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) 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:344) 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:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410) at org.eclipse.equinox.launcher.Main.main(Main.java:1386) Caused by: java.lang.ClassNotFoundException: com.google.appengine.tools.admin.AdminException at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) ... 74 more Apparently, its a problem with my environment, because this happens also with Eclipse Juno, after cleaning, switching workspaces, etc. I use windows XP sp3 32 bit, with GWT Eclipse plugin 3.2.0.v201302131858-rel-r37 Please help, im stuck with this error, I found no solution after googling for a few hours. Regards, Juan Ignacio -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit?hl=en. For more options, visit https://groups.google.com/groups/opt_out.