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Menu Run->Run ... does not work after deleting a project. Log entries: !ENTRY org.eclipse.jdt.launching 4 107 Jul 18, 2002 14:27:54.334 !MESSAGE Launch configuration TestCorbaConnection references non-existing project BillingInterface. !ENTRY org.eclipse.ui 4 4 Jul 18, 2002 14:28:06.351 !MESSAGE Unhandled exception caught in event loop. !ENTRY org.eclipse.ui 4 0 Jul 18, 2002 14:28:06.361 !MESSAGE java.lang.NullPointerException !STACK 0 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.setLaunchConfiguration(LaunchConfigurationDialog.java:1453) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.selectionChanged(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.doInitialTreeSelection(LaunchConfigurationDialog.java:537) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.createContents(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.doLastLaunchedConfig(LaunchConfigurationDialog.java:617) at org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationDialog.open(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 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:324) 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) I resolved the problem by clicking on an existing project, clicking Run->Run as->Java Application. Then the existing project ran and after that I could enter Run->Run ... and delete the run configuration of the deleted project.
Can you describe the exact steps to reproduce the null pointer exception? I tried the following steps: 1) Create java project 2) Create class with hello world main method 3) Create a launch configuration and run it 4) Delete the project 5) Open the launch configuration dialog (Run->Run...). -> Internal error in log file but not a NullPointerException. Moving to JDT-Debug.
Created attachment 1719 [details] Log file showing stack trace
NPE has been fixed (bug# 21170) *** This bug has been marked as a duplicate of 21170 ***
