java.lang.NullPointerException
   at org.netbeans.modules.form.FormDesigner$FormListener.updateConnectedProperties(FormDesigner.java:2698)
   at org.netbeans.modules.form.FormDesigner$FormListener.run(FormDesigner.java:2603)
   at org.netbeans.modules.form.FormLAF$3.run(FormLAF.java:322)
   at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
   at org.openide.util.Mutex.readAccess(Mutex.java:273)
   at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:305)
   at org.netbeans.modules.form.FormDesigner$FormListener.processEvents(FormDesigner.java:2491)
   at org.netbeans.modules.form.FormDesigner$FormListener.formChanged(FormDesigner.java:2457)
   at org.netbeans.modules.form.FormModel.fireEvents(FormModel.java:1322)
   at org.netbeans.modules.form.FormModel.fireEventBatch(FormModel.java:1295)
   at org.netbeans.modules.form.FormModel.firePendingEvents(FormModel.java:1258)
   at org.netbeans.modules.form.FormModel.access$000(FormModel.java:68)
   at org.netbeans.modules.form.FormModel$2.run(FormModel.java:1238)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:721)
   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.awt.EventQueue.dispatchEvent(EventQueue.java:691)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)