Java flex警报或弹出时出现错误#1009

每当我发出警报或弹出某些内容时，我的flex项目中就会出现错误#1009-

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.managers.marshalClasses::FocusManagerMarshalMixin/focusInHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.managers::FocusManager/focusInHandler()
at flash.display::Stage/set focus()
at mx.core::UIComponent/setFocus()
at spark.components::RichEditableText/setFocus()
at spark.components.supportClasses::SkinnableTextBase/setFocus()
at Utils.LogUtils::Logger/ShowLogMessageWindow()[C:\Branch_Code\{XXXXXX - Hidden     Path- XXXXXXXX}\Utils\LogUtils\Logger.as:49]
at com.X.views::AppView/viewLogsButtonHandler()[C:\XXXXXXXXXXXXXXXXXXXXXXXXXX:996]
at com.x.views::AppView/__idViewLog_click()[C:\XXXXXXXXXXXXXXXXXX.mxml:1433]

---

问题与ant构建脚本一样。它通过flex builder工作，但在通过ant生成的war中失败，我转储flex builder的所有配置，并使用配置文件使用的所有参数修改ant脚本，它开始工作

没有代码就说不出什么。