java.lang.NullPointerException
        at org.openide.awt.Mnemonics.findMnemonicAmpersand(Mnemonics.java:169)
        at org.openide.awt.AlwaysEnabledAction.extractCommonAttribute(AlwaysEnabledAction.java:91)
        at org.openide.awt.AlwaysEnabledAction.getValue(AlwaysEnabledAction.java:78)
        at javax.swing.AbstractButton.setMnemonicFromAction(AbstractButton.java:1236)
        at javax.swing.AbstractButton.configurePropertiesFromAction(AbstractButton.java:1140)
        at javax.swing.JMenuItem.configurePropertiesFromAction(JMenuItem.java:359)
        at javax.swing.AbstractButton.setAction(AbstractButton.java:1087)
        at javax.swing.JMenuItem.<init>(JMenuItem.java:122)
        at org.netbeans.modules.editor.NbEditorKit$NbBuildPopupMenuAction.createLocalizedMenuItem(NbEditorKit.java:402)
        at org.netbeans.modules.editor.NbEditorKit$NbBuildPopupMenuAction.addAction(NbEditorKit.java:439)
        at org.netbeans.modules.editor.NbEditorKit$NbBuildPopupMenuAction.buildPopupMenu(NbEditorKit.java:366)
        at org.netbeans.editor.ext.ExtKit$BuildPopupMenuAction.actionPerformed(ExtKit.java:276)
        at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:291)
        at org.netbeans.editor.EditorUI.showPopupMenu(EditorUI.java:1730)
        at org.netbeans.editor.EditorUI$6.run(EditorUI.java:1663)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        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)