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Hi Here is the context: Eclipse Version: 2.0 Build id: 200206271827 Java: java version "1.4.1_03" Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_03-b02) Java HotSpot(TM) Client VM (build 1.4.1_03-b02, mixed mode) java.lang.NullPointerException at org.eclipse.jdt.internal.launching.RuntimeClasspathEntry.<init> (RuntimeClasspathEntry.java:168) at org.eclipse.jdt.launching.JavaRuntime.newRuntimeClasspathEntry (JavaRuntime.java:504) at org.eclipse.jdt.launching.StandardClasspathProvider.recoverRuntimePath (StandardClasspathProvider.java:96) at org.eclipse.jdt.launching.StandardClasspathProvider.computeUnresolvedClasspath (StandardClasspathProvider.java:61) at org.eclipse.jdt.launching.JavaRuntime.computeUnresolvedRuntimeClasspath (JavaRuntime.java:763) at org.eclipse.jdt.debug.ui.launchConfigurations.JavaClasspathTab.initializeFrom (JavaClasspathTab.java:224) at org.eclipse.debug.ui.AbstractLaunchConfigurationTabGroup.initializeFrom (AbstractLaunchConfigurationTabGroup.java:78) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.se tLaunchConfiguration(LaunchConfigurationDialog.java:1453) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.se lectionChanged(LaunchConfigurationDialog.java:1382) at org.eclipse.jface.viewers.Viewer.fireSelectionChanged (Viewer.java:147) at org.eclipse.jface.viewers.StructuredViewer.updateSelection (StructuredViewer.java:1155) at org.eclipse.jface.viewers.StructuredViewer.setSelection (StructuredViewer.java:904) at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:342) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.do InitialTreeSelection(LaunchConfigurationDialog.java:537) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.cr eateContents(LaunchConfigurationDialog.java:456) at org.eclipse.jface.window.Window.create(Window.java:277) at org.eclipse.jface.window.Window.open(Window.java:526) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.do LastLaunchedConfig(LaunchConfigurationDialog.java:617) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.op en(LaunchConfigurationDialog.java:578) at org.eclipse.debug.internal.ui.actions.OpenLaunchConfigurationsAction.run (OpenLaunchConfigurationsAction.java:132) at org.eclipse.debug.internal.ui.actions.OpenLaunchConfigurationsAction.run (OpenLaunchConfigurationsAction.java:101) at org.eclipse.ui.internal.PluginAction.runWithEvent (PluginAction.java:210) at org.eclipse.ui.internal.WWinPluginAction.runWithEvent (WWinPluginAction.java:175) at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection (ActionContributionItem.java:407) at org.eclipse.jface.action.ActionContributionItem.handleWidgetEvent (ActionContributionItem.java:361) at org.eclipse.jface.action.ActionContributionItem.access$0 (ActionContributionItem.java:352) at org.eclipse.jface.action.ActionContributionItem$ActionListener.handleEvent (ActionContributionItem.java:47) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:77) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:827) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:1529) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1291) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1177) at org.eclipse.ui.internal.Workbench.run(Workbench.java:1160) at org.eclipse.core.internal.boot.InternalBootLoader.run (InternalBootLoader.java:775) at org.eclipse.core.boot.BootLoader.run(BootLoader.java:462) at java.lang.reflect.Method.invoke(Native Method) at org.eclipse.core.launcher.Main.basicRun(Main.java:248) at org.eclipse.core.launcher.Main.run(Main.java:698) at org.eclipse.core.launcher.Main.main(Main.java:534)
Looks like a duplicate of bug 21170 which is fixed in 2.0.1 and in 2.1 and in the 3.0 stream.
I concurr. It's a dup. *** This bug has been marked as a duplicate of 21170 ***