Hi all, I am trying to compile the source code of a demo that has come with the JfreeChart component. I have selected the ant build to be the build with default options. I am getting an error. The stack trace is below. What am I missing? java.lang.NullPointerException at org.eclipse.ant.internal.ui.AntUtil.isKnownAntFile(AntUtil.java:593) at org.eclipse.ant.internal.ui.launchConfigurations.AntLaunchShortcut.launch(An tLaunchShortcut.java:465) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutExtension.l aunch(LaunchShortcutExtension.java:424) at org.eclipse.debug.internal.ui.contextlaunching.ContextRunner.launchShortcut( ContextRunner.java:217) at org.eclipse.debug.internal.ui.contextlaunching.ContextRunner.showShortcutSel ectionDialog(ContextRunner.java:286) at org.eclipse.debug.internal.ui.contextlaunching.ContextRunner.selectAndLaunch (ContextRunner.java:140) at org.eclipse.debug.internal.ui.contextlaunching.ContextRunner.launch(ContextR unner.java:82) at org.eclipse.debug.internal.ui.actions.RelaunchLastAction.run(RelaunchLastAct ion.java:77) at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251) at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java: 229) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(Action ContributionItem.java:584) at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionI tem.java:501) at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContribu tionItem.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: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(EclipseAp pLauncher.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(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:619) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:574) at org.eclipse.equinox.launcher.Main.run(Main.java:1407) at org.eclipse.equinox.launcher.Main.main(Main.java:1383)