This morning I started up Eclipse and attempted to switch to design mode when GWT Designer Initialization fails (the error log is below). It literally worked fine yesterday and does not work today, and nothing has changed in my configuration or source. It broke while I was sleeping.
A few points:
1) Running GWT 1.5.2, OS X 10.5, Eclipse 3.4
2) It broke on two machines at the same time (they share projects via SVN)
3) All source files in the project I was working on fail in the same manner.
4) A new, virgin project does not fail.
So the conclusion is that there is a problem related to this particular project which propagated through SVN. But what is odd is that it spontaneously broke when I was sleeping.

Any suggestions to get GWT Designer working again would be appreciated, I really need it!
TIA
Ciao,
Rick
------------------------------------ Error Details Below -------------------------------------------
Plug-in Provider: Instantiations
Plug-in Name: GWT Designer Subscription
Plug-in ID: com.swtdesigner
Plug-in Version: 5.1.0.200901011317
java.lang.NullPointerException
at com.instantiations.designer.gwt.hosted.odf.HostedModeSupport.getClassLoader(HostedModeSupport.java:142)
at com.swtdesigner.gwt.model.widgets.support.GWTState.getClassLoader(GWTState.java:538)
at com.swtdesigner.gwt.model.widgets.support.GWTState.addNonAbstractClass(GWTState.java:558)
at com.swtdesigner.gwt.model.widgets.support.GWTState.initClassesAndMethods(GWTState.java:582)
at com.swtdesigner.gwt.model.widgets.support.GWTState$1.run(GWTState.java:168)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:458)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:366)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275)
at org.eclipse.ui.internal.progress.ProgressManager.run(ProgressManager.java:1191)
at com.swtdesigner.gwt.model.widgets.support.GWTState.<init>(GWTState.java:185)
at com.swtdesigner.gwt.model.widgets.support.GWTState.createState(GWTState.java:1875)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.getState(UIObjectInfo.java:429)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.classByName(UIObjectInfo.java:191)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.<init>(UIObjectInfo.java:68)
at com.swtdesigner.gwt.model.widgets.WidgetInfo.<init>(WidgetInfo.java:56)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.<init>(AbstractContainerInfo.java:37)
at com.swtdesigner.gwt.model.widgets.panel.PanelInfo.<init>(PanelInfo.java:25)
at com.swtdesigner.gwt.model.widgets.panel.ComplexPanelInfo.<init>(ComplexPanelInfo.java:26)
at com.swtdesigner.gwt.model.widgets.panel.AbsolutePanelInfo.<init>(AbsolutePanelInfo.java:36)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.swtdesigner.gwt.model.GWTJavaInfoFactory.create(GWTJavaInfoFactory.java:163)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:114)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:97)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:90)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.endVisit(JavaInfoParser.java:1450)
at org.eclipse.jdt.core.dom.ClassInstanceCreation.accept0(ClassInstanceCreation.java:337)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.VariableDeclarationFragment.accept0(VariableDeclarationFragment.java:225)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.VariableDeclarationStatement.accept0(VariableDeclarationStatement.java:273)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.Block.accept0(Block.java:136)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:502)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.visit(JavaInfoParser.java:3116)
at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:467)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:214)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser.parse(JavaInfoParser.java:323)
at com.swtdesigner.gef.DesignerEditor.parseCompilationUnit(DesignerEditor.java:1201)
at com.swtdesigner.gef.DesignerEditor$18.execute(DesignerEditor.java:1126)
at com.swtdesigner.model.swing.properties.custom.DesignTimeHelper.execute(DesignTimeHelper.java:54)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1120)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1111)
at com.swtdesigner.editors.MultiPageEditor.showDesignEditor(MultiPageEditor.java:392)
at com.swtdesigner.editors.MultiPageEditor$2.widgetSelected(MultiPageEditor.java:178)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1561)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1585)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1570)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1360)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3242)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2017)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:320)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1561)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1585)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1570)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1360)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3482)
at org.eclipse.swt.widgets.Control.sendTrackEvents(Control.java:3024)
at org.eclipse.swt.widgets.Control.actionProc(Control.java:122)
at org.eclipse.swt.widgets.Display.actionProc(Display.java:362)
at org.eclipse.swt.internal.carbon.OS.CallNextEventHandler(Native Method)
at org.eclipse.swt.widgets.Widget.kEventControlTrack(Widget.java:1106)
at org.eclipse.swt.widgets.Control.kEventControlTrack(Control.java:2097)
at org.eclipse.swt.widgets.Widget.controlProc(Widget.java:375)
at org.eclipse.swt.widgets.Display.controlProc(Display.java:862)
at org.eclipse.swt.internal.carbon.OS.SendEventToEventTarget(Native Method)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3051)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
Full stack trace (to see full context):
org.apache.commons.lang.exception.NestableError: com.swtdesigner.properties.PropertyException: java.lang.reflect.InvocationTargetException
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:120)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:97)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:90)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.endVisit(JavaInfoParser.java:1450)
at org.eclipse.jdt.core.dom.ClassInstanceCreation.accept0(ClassInstanceCreation.java:337)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.VariableDeclarationFragment.accept0(VariableDeclarationFragment.java:225)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.VariableDeclarationStatement.accept0(VariableDeclarationStatement.java:273)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.Block.accept0(Block.java:136)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:502)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.visit(JavaInfoParser.java:3116)
at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:467)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:214)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser.parse(JavaInfoParser.java:323)
at com.swtdesigner.gef.DesignerEditor.parseCompilationUnit(DesignerEditor.java:1201)
at com.swtdesigner.gef.DesignerEditor$18.execute(DesignerEditor.java:1126)
at com.swtdesigner.model.swing.properties.custom.DesignTimeHelper.execute(DesignTimeHelper.java:54)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1120)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1111)
at com.swtdesigner.editors.MultiPageEditor.showDesignEditor(MultiPageEditor.java:392)
at com.swtdesigner.editors.MultiPageEditor$2.widgetSelected(MultiPageEditor.java:178)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:228)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1561)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1585)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1570)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1360)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3242)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:2017)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:320)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1561)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1585)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1570)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1360)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3482)
at org.eclipse.swt.widgets.Control.sendTrackEvents(Control.java:3024)
at org.eclipse.swt.widgets.Control.actionProc(Control.java:122)
at org.eclipse.swt.widgets.Display.actionProc(Display.java:362)
at org.eclipse.swt.internal.carbon.OS.CallNextEventHandler(Native Method)
at org.eclipse.swt.widgets.Widget.kEventControlTrack(Widget.java:1106)
at org.eclipse.swt.widgets.Control.kEventControlTrack(Control.java:2097)
at org.eclipse.swt.widgets.Widget.controlProc(Widget.java:375)
at org.eclipse.swt.widgets.Display.controlProc(Display.java:862)
at org.eclipse.swt.internal.carbon.OS.SendEventToEventTarget(Native Method)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3051)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)
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:386)
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:585)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
Caused by: com.swtdesigner.properties.PropertyException: java.lang.reflect.InvocationTargetException
at com.swtdesigner.gwt.model.GWTJavaInfoFactory.create(GWTJavaInfoFactory.java:171)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:114)
... 76 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.swtdesigner.gwt.model.GWTJavaInfoFactory.create(GWTJavaInfoFactory.java:163)
... 77 more
Caused by: org.apache.commons.lang.exception.NestableError: org.apache.commons.lang.exception.NestableError: java.lang.reflect.InvocationTargetException
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.classByName(UIObjectInfo.java:193)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.<init>(UIObjectInfo.java:68)
at com.swtdesigner.gwt.model.widgets.WidgetInfo.<init>(WidgetInfo.java:56)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.<init>(AbstractContainerInfo.java:37)
at com.swtdesigner.gwt.model.widgets.panel.PanelInfo.<init>(PanelInfo.java:25)
at com.swtdesigner.gwt.model.widgets.panel.ComplexPanelInfo.<init>(ComplexPanelInfo.java:26)
at com.swtdesigner.gwt.model.widgets.panel.AbsolutePanelInfo.<init>(AbsolutePanelInfo.java:36)
... 82 more
Caused by: org.apache.commons.lang.exception.NestableError: java.lang.reflect.InvocationTargetException
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.getState(UIObjectInfo.java:436)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.classByName(UIObjectInfo.java:191)
... 88 more
Caused by: java.lang.reflect.InvocationTargetException
at com.swtdesigner.gwt.model.widgets.support.GWTState$1.run(GWTState.java:174)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:458)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:366)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275)
at org.eclipse.ui.internal.progress.ProgressManager.run(ProgressManager.java:1191)
at com.swtdesigner.gwt.model.widgets.support.GWTState.<init>(GWTState.java:185)
at com.swtdesigner.gwt.model.widgets.support.GWTState.createState(GWTState.java:1875)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.getState(UIObjectInfo.java:429)
... 89 more
Caused by: java.lang.NullPointerException
at com.instantiations.designer.gwt.hosted.odf.HostedModeSupport.getClassLoader(HostedModeSupport.java:142)
at com.swtdesigner.gwt.model.widgets.support.GWTState.getClassLoader(GWTState.java:538)
at com.swtdesigner.gwt.model.widgets.support.GWTState.addNonAbstractClass(GWTState.java:558)
at com.swtdesigner.gwt.model.widgets.support.GWTState.initClassesAndMethods(GWTState.java:582)
at com.swtdesigner.gwt.model.widgets.support.GWTState$1.run(GWTState.java:168)
... 97 more
Designer Configuration Details:
Product: GWT Designer Subscription
Version: 5.1.0.200901011317
Expected: Eclipse 3.4
Actual: Eclipse 3.4.0.v20080512
Actual Eclipse Build Name:
Actual Eclipse Build ID: M20080709-0800
IDE Actual Name: Eclipse
IDE Actual Version: 3.3.101.v200809111700
IDE Actual NL: en_US
Serial Number: GWTDesignerSubscription-01688-9687
Activation Key: GWTDesignerSubscription-ND0TF-KM1AZ-8R7MC
Physical Address: 00-01-23-45-67-89, HardwareAddress[00-17-F2-D3-B8-5E], HardwareAddress[00-19-E3-FF-FE-77-B8-76]
Code Gen: Flat Mode, Use Existing, First Assignment, Make Final
Events: Anonymous Class
GWT Home: /Users/radunlap/Documents/Work Stuff/GWT/gwt-mac-1.5.3
Platform Product: Eclipse
Platform Version: 3.3.101.v200809111700
OS Name: Mac OS X
OS Architecture: i386
OS Version: 10.5.6