java.lang.NullPointerException
        at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.preferredProject(OpenProjectList.java:334)
        at org.netbeans.modules.project.ui.OpenProjectList.preferredProject(OpenProjectList.java:232)
        at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.resultChanged(OpenProjectList.java:430)
        at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.run(OpenProjectList.java:300)
        at org.netbeans.core.windows.WindowManagerImpl$Exclusive.run(WindowManagerImpl.java:1355)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        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)