java.lang.AssertionError
   at org.netbeans.modules.project.ui.groups.Group.setMainProject(Group.java:363)
   at org.netbeans.modules.project.ui.groups.NewGroupPanel.create(NewGroupPanel.java:189)
   at org.netbeans.modules.project.ui.groups.GroupsMenu.newGroup(GroupsMenu.java:310)
   at org.netbeans.modules.project.ui.groups.GroupsMenu.access$200(GroupsMenu.java:94)
   at org.netbeans.modules.project.ui.groups.GroupsMenu$Menu$4.actionPerformed(GroupsMenu.java:243)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
   at com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:115)
   at java.awt.MenuItem.processActionEvent(MenuItem.java:669)
   at java.awt.MenuItem.processEvent(MenuItem.java:628)
   at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:351)
   at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:339)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:726)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:696)
   at java.awt.EventQueue$4.run(EventQueue.java:694)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)