ReferenceError: Error #1069: Property DSPriority not found on String and there is no default value.

Question

Hi All
                  This is the Error where i got from my sample chatting application...
ReferenceError: Error #1069: Property DSPriority not found on String and there is no default value.
at mx.messaging::Producer/handlePriority()[E:\dev\4.x\frameworks\projects\rpc\src\mx\messagi ng\Producer.as:190]
at mx.messaging::Producer/internalSend()[E:\dev\4.x\frameworks\projects\rpc\src\mx\messaging \Producer.as:169]
at mx.messaging::AbstractProducer/send()[E:\dev\4.x\frameworks\projects\rpc\src\mx\messaging \AbstractProducer.as:561]
at SampleMessagin/sendMessage()[D:\FlexJavaPrograms\SampleMessagin\src\SampleMessagin.mxml:2 9]
at SampleMessagin/___SampleMessagin_Button2_click()[D:\FlexJavaPrograms\SampleMessagin\src\S ampleMessagin.mxml:74]
                    this is the code
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
      xmlns:s="library://ns.adobe.com/flex/spark"
      xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
      currentState="{st}"
      creationComplete="consumer.subscribe()">
<fx:Script>
  <![CDATA[
   import mx.messaging.events.MessageEvent;
   import mx.messaging.messages.AsyncMessage;
   import mx.messaging.messages.IMessage;
   import mx.modules.IModule;
   import mx.states.State;
   [Bindable]
   public var st:String="";
   public function changeStateHandler(event:Event):void
    st = "Login"
   //send message throug this method
   protected function sendMessage():void
    var msg:IMessage = new AsyncMessage();
    msg.headers = uname.text;
    msg.body = sendText.text;
    producer.send(msg);
    sendText.text = " ";
  //message  Handler  
   protected function consumer_messageHandler(event:MessageEvent):void
    // TODO Auto-generated method stub
    var resp:IMessage = event as IMessage;
    dispText.text = resp.headers.toString()+" :: "+resp.body.toString()+"\n";
  ]]>
</fx:Script>
<fx:Declarations>
  <s:Producer id="producer"
     destination="chat"/>
  <s:Consumer id="consumer"
     destination="chat"
     message="consumer_messageHandler(event)"/>
  </fx:Declarations>
<s:states>
  <s:State name="State1"/>
  <s:State name="Login"/>
</s:states>
<s:Panel x="246" y="137" width="366" height="200" title="Login Here" includeIn="State1">
  <mx:HBox horizontalCenter="2" verticalCenter="-30">
   <s:Label text="Enter UR Name"/>
   <s:TextInput id="uname"/>
   <s:Button id="login" label="Login" click="changeStateHandler(event)"/>
  </mx:HBox>
</s:Panel>
<s:Panel includeIn="Login" x="327" y="78" width="353" height="369"  title="Welcome:{uname.text}">
  <s:TextArea x="6" y="11" height="222" width="335" id="dispText"/>
  <s:TextArea x="10" y="241" height="85" width="258" id="sendText"/>
  <s:Button x="276" y="241" label="Send" height="76" click="sendMessage()"/>
</s:Panel>
</s:Application>
and my messaging-config.xml is as follows
             <?xml version="1.0" encoding="UTF-8"?>
<service id="message-service"
    class="flex.messaging.services.MessageService">
    <adapters>
        <adapter-definition id="actionscript" class="flex.messaging.services.messaging.adapters.ActionScriptAdapter" default="true" />
        <!-- <adapter-definition id="jms" class="flex.messaging.services.messaging.adapters.JMSAdapter"/> -->
    </adapters>
    <default-channels>
        <channel ref="my-polling-amf"/>
    </default-channels>
    <destination id="chat"/>
</service>
                  can any one help me what is the error present here.............
                     why it is showing error .. am i wrote anything wrong in this code .. please help me....

Answer 1

I'm not the expert on this topic, but I think this line:
msg.headers = uname.text;
...is throwing the error. Look into how to properly construct the headers for the message. They should be in name/value pairs.