java.lang.IllegalStateException
        at org.netbeans.modules.beans.beaninfo.GenerateBeanInfoAction$BeanInfoWorker.checkState(GenerateBeanInfoAction.java:287)
        at org.netbeans.modules.beans.beaninfo.GenerateBeanInfoAction$BeanInfoWorker.generateSources(GenerateBeanInfoAction.java:184)
        at org.netbeans.modules.beans.beaninfo.BIEditorSupport.saveDocument(BIEditorSupport.java:183)
        at org.netbeans.modules.beans.beaninfo.BIEditorSupport$Environment$SaveSupport.save(BIEditorSupport.java:640)
        at org.openide.actions.SaveAction.performAction(SaveAction.java:80)
        at org.openide.util.actions.NodeAction.performAction(NodeAction.java:289)
        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.util.actions.NodeAction.actionPerformed(NodeAction.java:277)
        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.openide.explorer.propertysheet.BaseTable.processKeyEvent(BaseTable.java:818)
        at java.awt.Component.processEvent(Component.java:5876)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4466)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4296)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:704)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:969)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:841)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:668)
        at java.awt.Component.dispatchEventImpl(Component.java:4338)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Window.dispatchEventImpl(Window.java:2454)
        at java.awt.Component.dispatchEvent(Component.java:4296)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284)
        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)