java.lang.AssertionError
	at org.netbeans.api.project.ProjectManager.checkForProject(ProjectManager.java:306)
	at org.netbeans.api.project.ProjectManager.access$600(ProjectManager.java:40)
	at org.netbeans.api.project.ProjectManager$3.run(ProjectManager.java:281)
	at org.openide.util.Mutex.readAccess(Mutex.java:169)
	at org.netbeans.api.project.ProjectManager.isProject(ProjectManager.java:255)
	at org.netbeans.modules.project.ui.ProjectChooserAccessory.isProjectDir(ProjectChooserAccessory.java:234)
	at org.netbeans.modules.project.ui.ProjectChooserAccessory.access$200(ProjectChooserAccessory.java:48)
	at org.netbeans.modules.project.ui.ProjectChooserAccessory$ProjectFileView.getIcon(ProjectChooserAccessory.java:449)
	at javax.swing.JFileChooser.getIcon(JFileChooser.java:1527)
	at com.sun.java.swing.plaf.windows.WindowsFileChooserUI$DirectoryComboBoxRenderer.getListCellRendererComponent(WindowsFileChooserUI.java:939)
	at javax.swing.plaf.basic.BasicComboBoxUI.getDisplaySize(BasicComboBoxUI.java:1182)
	at javax.swing.plaf.basic.BasicComboBoxUI.getMinimumSize(BasicComboBoxUI.java:865)
	at javax.swing.JComponent.getMinimumSize(JComponent.java:1659)
	at com.sun.java.swing.plaf.windows.WindowsFileChooserUI$2.getMinimumSize(WindowsFileChooserUI.java:242)
	at javax.swing.BoxLayout.checkRequests(BoxLayout.java:433)
	at javax.swing.BoxLayout.preferredLayoutSize(BoxLayout.java:251)
	at javax.swing.JToolBar$DefaultToolBarLayout.preferredLayoutSize(JToolBar.java:769)
	at java.awt.Container.preferredSize(Container.java:1554)
	at java.awt.Container.getPreferredSize(Container.java:1540)
	at javax.swing.JComponent.getPreferredSize(JComponent.java:1581)
	at java.awt.BorderLayout.preferredLayoutSize(BorderLayout.java:694)
	at com.sun.java.swing.plaf.windows.WindowsFileChooserUI.getPreferredSize(WindowsFileChooserUI.java:642)
	at javax.swing.JComponent.getPreferredSize(JComponent.java:1579)
	at java.awt.BorderLayout.preferredLayoutSize(BorderLayout.java:689)
	at java.awt.Container.preferredSize(Container.java:1554)
	at java.awt.Container.getPreferredSize(Container.java:1540)
	at javax.swing.JComponent.getPreferredSize(JComponent.java:1581)
	at javax.swing.JRootPane$RootLayout.preferredLayoutSize(JRootPane.java:820)
	at java.awt.Container.preferredSize(Container.java:1554)
	at java.awt.Container.getPreferredSize(Container.java:1540)
	at javax.swing.JComponent.getPreferredSize(JComponent.java:1581)
	at java.awt.BorderLayout.preferredLayoutSize(BorderLayout.java:689)
	at java.awt.Container.preferredSize(Container.java:1554)
	at java.awt.Container.getPreferredSize(Container.java:1540)
	at java.awt.Window.pack(Window.java:478)
	at javax.swing.JFileChooser.createDialog(JFileChooser.java:772)
	at javax.swing.JFileChooser.showDialog(JFileChooser.java:708)
	at javax.swing.JFileChooser.showOpenDialog(JFileChooser.java:620)
	at org.netbeans.modules.project.ui.actions.OpenProject.actionPerformed(OpenProject.java:49)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2167)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
	at java.awt.Component.processMouseEvent(Component.java:5465)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3089)
	at java.awt.Component.processEvent(Component.java:5230)
	at java.awt.Container.processEvent(Container.java:1961)
	at java.awt.Component.dispatchEventImpl(Component.java:3933)
	at java.awt.Container.dispatchEventImpl(Container.java:2019)
	at java.awt.Component.dispatchEvent(Component.java:3781)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4205)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3885)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3815)
	at java.awt.Container.dispatchEventImpl(Container.java:2005)
	at java.awt.Window.dispatchEventImpl(Window.java:1764)
	at java.awt.Component.dispatchEvent(Component.java:3781)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)