java.lang.IllegalArgumentException: Project ??? is not open and cannot be set as main.
        at org.netbeans.modules.project.ui.OpenProjectList.setMainProject(OpenProjectList.java:743)
        at org.netbeans.modules.project.ui.actions.OpenProject.actionPerformed(OpenProject.java:136)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:334)
        at apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:96)
        at java.awt.MenuItem.processActionEvent(MenuItem.java:597)
        at java.awt.MenuItem.processEvent(MenuItem.java:556)
        at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:298)
        at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:286)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:466)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)