Error: The channel class 'mx.messaging.channels.AMFChannel' specified was not found

Question

Hi guys. I'm stuck with the class not found error trying to use remote objects with BlazeDS. I'm building the application using flex sdk 3, Ant flexTasks.jar (without FlexBuilder) and Tomcat 5.5.17. The result after clicking on the Remote service button is a window with the following error message: <br />[MessagingError message='The channel class 'mx.messaging.channels.AMFChannel' specified was not found.']<br /><br />In my code, I have in main.mxml:<br /><?xml version="1.0" encoding="utf-8"?><br /><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"layout="vertical"><br /><mx:Script>..CDATA[import mx.controls.Alert;..</mx:Script><br /><mx:RemoteObject id="remObj" destination="product" result="Alert.show(event.result.toString());" fault="Alert.show(event.fault.faultString);"/><br /><mx:Button id="remoteService" label="Remote Service" click="remObj.getResults('MyName');"/><br /></mx:Application><br /><br />In remoting-config.xml:<br /><?xml version="1.0" encoding="UTF-8"?><br /><service id="remoting-service" class="flex.messaging.services.RemotingService"><br />    <adapters><br />        <adapter-definition id="java-object" class="flex.messaging.services.remoting.adapters.JavaAdapter" default="true"/><br />    </adapters><br />    <default-channels><br />        <channel ref="my-amf"/><br />    </default-channels><br />     <destination id="product" channels="my-amf"><br />         <properties><br />           <source>flex.example.ProductService</source><br />             <scope>application</scope><br />         </properties><br />         <adapter ref="java-object"/><br />     </destination><br /></service><br /><br />In java:<br />package flex.examples.ProductService;<br />public class ProductService{     <br />public String getResults(String name)<br />{<br />     String result = null;<br />     result = "Hi " + name + ", this is a service and the time now is : " + new Date();<br />     return result;<br />     }<br />}<br /><br />The services-config.xml is a standard like delivered within blazeds.war.<br /><br />My guess is that something is wrong is with the compilation. My Ant compile task looks like:<br /> <target name="compile_flex_examples"><br />     <mxmlc file="${param1}" keep-generated-actionscript="true"<br />           context-root="${app.name}"  <br />         services="${webinf}/flex/services-config.xml"><br />                   <compiler.library-path dir="${FLEX_HOME}/frameworks" <br />                 append="true"><br />                         <include name="${webinf}/lib/" /><br />                   </compiler.library-path><br />                   <compiler.library-path dir="${FLEX_HOME}/frameworks"       <br />                 append="true"><br />                        <include name="libs/flex.swc" /><br />                      <include name="libs/rpc.swc" /><br />                      <include name="libs/utilities.swc" /><br />                      <include name="libs/fds.swc" /><br />                   </compiler.library-path><br />         <load-config filename="${FLEX_HOME}/frameworks/flex-config.xml"/><br />         <source-path path-element="${FLEX_HOME}/frameworks"/><br />     </mxmlc><br /> </target><br /><br />Any idea why Flex can not find the mx.messaging.channels.AMFChannel class? Any hint very appeciated.<br /><br />Thanks in advance.<br /><br />Devus

Answer 1

Did you have figure out the problem to this?
I am getting the same error message. I had two interdependant applications that were working fine when I specify a service-config.xml file at compire time. However when I try to dynamiclly configure the services at runtime, one application works, but the other doesn't. I'm not sure why mx.messaging.channels.AMFChannel is available in the one app, but not the other.
Any pointers???