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java.lang.NullPointerException: 	at com.springsource.sts.internal.server.tc.ui.TcServer21WizardFragment.validate(TcServer21WizardFragment.java:257)	at com.springsource.sts.internal.server.tc.ui.TcServer21WizardFragment.enter(TcServer21WizardFragment.java:150)	at org.eclipse.wst.server.ui.internal.wizard.TaskWizard$2$1.run(TaskWizard.java:177)	at org.eclipse.ui.internal.UILockListener.doPendingWork(UILockListener.java:164)	at org.eclipse.ui.internal.UISynchronizer$3.run(UISynchronizer.java:158)	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3938)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3615)	at org.eclipse.jface.operation.ModalContext$ModalContextThread.block(ModalContext.java:173)	at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:388)	at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:1029)	at org.eclipse.wst.server.ui.internal.wizard.TaskWizard.performFinish(TaskWizard.java:227)	at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:827)	at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:432)	at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:624)	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.Display.sendEvent(Display.java:4128)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3613)	at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)	at org.eclipse.jface.window.Window.open(Window.java:801)	at org.eclipse.wst.server.ui.internal.actions.LaunchWizardAction.run(LaunchWizardAction.java:57)	at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)	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.Display.sendEvent(Display.java:4128)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465)	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3613)	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(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: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)