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Clicking "Open Project" gives "Unexpected Exception" A org.openide.util.RequestProcessor$SlowItem exception has occurred. Please report this at http://www.netbeans.org/community/issues.html, including a copy of your messages.log file as an attachment. The messages.log file is located in your C:\Documents and Settings\user\.netbeans\6.8beta\var\log folder. Cancel it, then select the project to be opened without problem.
Without the stack trace I have no way of knowing what the exception is or how it could be fixed. Next time, please do what the text you pasted says to do (or just click the Review And Report button in the dialog and the stack trace will automatically be uploaded to the server and matched against any existing bug reports). Are you using JDK 7? There is a known JDK bug that causes a NullPointerException whenever you open the project chooser dialog, which has already been reported to the JDK team with instructions for how to fix.
java.lang.NullPointerException at javax.swing.ImageIcon.<init>(ImageIcon.java:190) at org.openide.util.ImageUtilities.image2Icon(ImageUtilities.java:204) at org.netbeans.modules.project.ant.AntBasedGenericType.getIcon(AntBasedGenericType.java:91) at org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.isProject2(AntBasedProjectFactorySingleton.java:200) at org.netbeans.api.project.ProjectManager.checkForProject(ProjectManager.java:499) at org.netbeans.api.project.ProjectManager.access$600(ProjectManager.java:80) at org.netbeans.api.project.ProjectManager$3.run(ProjectManager.java:454) at org.netbeans.api.project.ProjectManager$3.run(ProjectManager.java:434) at org.openide.util.Mutex.readAccess(Mutex.java:285) at org.netbeans.api.project.ProjectManager.isProject2(ProjectManager.java:434) at org.netbeans.api.project.ProjectManager.isProject2(ProjectManager.java:418) at org.netbeans.modules.project.ui.ProjectChooserAccessory.getProjectResult(ProjectChooserAccessory.java:405) at org.netbeans.modules.project.ui.ProjectChooserAccessory.access$900(ProjectChooserAccessory.java:85) at org.netbeans.modules.project.ui.ProjectChooserAccessory$ProjectFileView.run(ProjectChooserAccessory.java:644) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:602) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1084) Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:655) at org.netbeans.modules.project.ui.ProjectChooserAccessory$ProjectFileView.getIcon(ProjectChooserAccessory.java:628) at javax.swing.JFileChooser.getIcon(JFileChooser.java:1535) at org.netbeans.swing.dirchooser.DirectoryChooserUI$DirectoryTreeRenderer.getNodeIcon(DirectoryChooserUI.java:2427) at org.netbeans.swing.dirchooser.DirectoryChooserUI$DirectoryTreeRenderer.getTreeCellRendererComponent(DirectoryChooserUI.java:2411) at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(BasicTreeUI.java:2717) at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(AbstractLayoutCache.java:475) at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:535) at javax.swing.tree.FixedHeightLayoutCache.getBounds(FixedHeightLayoutCache.java:181) at javax.swing.tree.AbstractLayoutCache.getPreferredWidth(AbstractLayoutCache.java:215) at javax.swing.plaf.basic.BasicTreeUI.updateCachedPreferredSize(BasicTreeUI.java:1825) at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1926) at javax.swing.plaf.basic.BasicTreeUI.getPreferredSize(BasicTreeUI.java:1914) at javax.swing.JComponent.getPreferredSize(JComponent.java:1632) at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:769) at java.awt.Container.layout(Container.java:1404) at java.awt.Container.doLayout(Container.java:1393) at java.awt.Container.validateTree(Container.java:1492) at java.awt.Container.validateTree(Container.java:1498) at java.awt.Container.validateTree(Container.java:1498) at java.awt.Container.validateTree(Container.java:1498) at java.awt.Container.validateTree(Container.java:1498) at java.awt.Container.validateTree(Container.java:1498) at java.awt.Container.validateTree(Container.java:1498) at java.awt.Container.validateTree(Container.java:1498) at java.awt.Container.validate(Container.java:1463) at java.awt.Window.dispatchEventImpl(Window.java:2456) at java.awt.Component.dispatchEvent(Component.java:4331) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178) at java.awt.Dialog$1.run(Dialog.java:1046) at java.awt.Dialog$3.run(Dialog.java:1098) at java.security.AccessController.doPrivileged(Native Method) at java.awt.Dialog.show(Dialog.java:1096) at javax.swing.JFileChooser.showDialog(JFileChooser.java:723) at javax.swing.JFileChooser.showOpenDialog(JFileChooser.java:626) at org.netbeans.modules.project.ui.actions.OpenProject.actionPerformed(OpenProject.java:104) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.AbstractButton.doClick(AbstractButton.java:357) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1220) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.menuDragMouseReleased(BasicMenuItemUI.java:1324) at javax.swing.JMenuItem.fireMenuDragMouseReleased(JMenuItem.java:568) at javax.swing.JMenuItem.processMenuDragMouseEvent(JMenuItem.java:465) at javax.swing.JMenuItem.processMouseEvent(JMenuItem.java:411) at javax.swing.MenuSelectionManager.processMouseEvent(MenuSelectionManager.java:304) at javax.swing.plaf.basic.BasicPopupMenuUI$MouseGrabber.eventDispatched(BasicPopupMenuUI.java:817) at java.awt.Toolkit$SelectiveAWTEventListener.eventDispatched(Toolkit.java:2353) at java.awt.Toolkit$ToolkitEventMulticaster.eventDispatched(Toolkit.java:2245) at java.awt.Toolkit.notifyAWTEventListeners(Toolkit.java:2203) at java.awt.Component.dispatchEventImpl(Component.java:4399) at java.awt.Container.dispatchEventImpl(Container.java:2088) at java.awt.Component.dispatchEvent(Component.java:4331) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4303) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3967) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3897) at java.awt.Container.dispatchEventImpl(Container.java:2074) at java.awt.Window.dispatchEventImpl(Window.java:2458) at java.awt.Component.dispatchEvent(Component.java:4331) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Fixed in main/ 012542580f28