H! i'm new to the Development of Adobe Air Application. i am suck in this ERROR..If any buddy knows about this error then show me roads towards a solution. ERRoR is as Follow: **TypeError: Error #2007: Parameter type must be non-null.** at flash.events::EventDispatcher/addEventListener() at mx.validators::Validator/addTriggerHandler()[E:\dev\4.y\frameworks\projects\framework\src\mx\validators\Validator.as:805] at mx.validators::Validator/set source()[E:\dev\4.y\frameworks\projects\framework\src\mx\validators\Validator.as:581] at mx.binding::Binding/defaultDestFunc()[E:\dev\4.y\frameworks\projects\framework\src\mx\binding\Binding.as:282] at Function/http://adobe.com/AS3/2006/builtin::call() at mx.binding::Binding/innerExecute()[E:\dev\4.y\frameworks\projects\framework\src\mx\binding\Binding.as:485] at Function/http://adobe.com/AS3/2006/builtin::apply() at mx.binding::Binding/wrapFunctionCall()[E:\dev\4.y\frameworks\projects\framework\src\mx\binding\Binding.as:395] at mx.binding::Binding/execute()[E:\dev\4.y\frameworks\projects\framework\src\mx\binding\Binding.as:333] at mx.binding::Binding/watcherFired()[E:\dev\4.y\frameworks\projects\framework\src\mx\binding\Binding.as:511] at mx.binding::Watcher/notifyListeners()[E:\dev\4.y\frameworks\projects\framework\src\mx\binding\Watcher.as:311] at mx.binding::PropertyWatcher/eventHandler()[E:\dev\4.y\frameworks\projects\framework\src\mx\binding\PropertyWatcher.as:377] at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[E:\dev\4.y\frameworks\projects\framework\src\mx\core\UIComponent.as:13152] Thanks, JK Patel
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**TypeError: Error #2007: Parameter type must be non-null.**
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