java.lang.NullPointerException
        at org.netbeans.modules.form.RADVisualContainer.getContainerDelegate(RADVisualContainer.java:187)
        at org.netbeans.modules.form.layoutsupport.LayoutSupportManager.isLayoutChanged(LayoutSupportManager.java:605)
        at org.netbeans.modules.form.JavaCodeGenerator.generateOldLayout(JavaCodeGenerator.java:1211)
        at org.netbeans.modules.form.JavaCodeGenerator.addInitCode(JavaCodeGenerator.java:1114)
        at org.netbeans.modules.form.JavaCodeGenerator.regenerateInitComponents(JavaCodeGenerator.java:959)
        at org.netbeans.modules.form.JavaCodeGenerator.regenerateCode(JavaCodeGenerator.java:3341)
        at org.netbeans.modules.form.JavaCodeGenerator$FormListener.formChanged(JavaCodeGenerator.java:3805)
        at org.netbeans.modules.form.FormModel.fireEvents(FormModel.java:1170)
        at org.netbeans.modules.form.FormModel.fireEventBatch(FormModel.java:1143)
        at org.netbeans.modules.form.FormModel.firePendingEvents(FormModel.java:1106)
        at org.netbeans.modules.form.FormModel.sendEventImmediately(FormModel.java:1098)
        at org.netbeans.modules.form.FormModel.fireFormToBeSaved(FormModel.java:767)
        at org.netbeans.modules.form.FormEditor.saveFormData(FormEditor.java:362)
        at org.netbeans.modules.form.FormEditorSupport.saveDocument(FormEditorSupport.java:305)
        at org.openide.text.CloneableEditorSupport.canClose(CloneableEditorSupport.java:1158)
        at org.openide.text.DataEditorSupport.canClose(DataEditorSupport.java:340)
        at org.netbeans.modules.form.FormEditorSupport.reloadForm(FormEditorSupport.java:398)
        at org.netbeans.modules.form.actions.ReloadAction.performAction(ReloadAction.java:90)
        at org.openide.util.actions.CallableSystemAction$1.run(CallableSystemAction.java:118)
        at org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:77)
        at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:114)
        at org.openide.windows.TopComponent.processKeyBinding(TopComponent.java:971)
        at javax.swing.JComponent.processKeyBindings(JComponent.java:2895)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2812)
        at org.netbeans.modules.form.HandleLayer.processKeyEvent(HandleLayer.java:503)
        at java.awt.Component.processEvent(Component.java:5815)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4410)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:697)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:962)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:834)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:661)
        at java.awt.Component.dispatchEventImpl(Component.java:4282)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Window.dispatchEventImpl(Window.java:2429)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)