java.lang.NullPointerException
   at org.netbeans.modules.form.layoutdesign.VisualState.updateCurrentSpaceOfComponents(VisualState.java:120)
   at org.netbeans.modules.form.layoutdesign.LayoutDesigner.updateContainerAfterBuild(LayoutDesigner.java:3517)
   at org.netbeans.modules.form.layoutdesign.LayoutDesigner.updateContainerAfterBuild(LayoutDesigner.java:3520)
   at org.netbeans.modules.form.layoutdesign.LayoutDesigner.updateCurrentState(LayoutDesigner.java:321)
   at org.netbeans.modules.form.layoutdesign.LayoutDesigner.updateCurrentState(LayoutDesigner.java:196)
   at org.netbeans.modules.form.FormDesigner.updateComponentLayer(FormDesigner.java:642)
   at org.netbeans.modules.form.FormDesigner.access$2100(FormDesigner.java:103)
   at org.netbeans.modules.form.FormDesigner$FormListener$2.run(FormDesigner.java:2526)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:701)
   at java.awt.EventQueue.access$000(EventQueue.java:102)
   at java.awt.EventQueue$3.run(EventQueue.java:662)
   at java.awt.EventQueue$3.run(EventQueue.java:660)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:671)
   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)