Auto update using AIR 2.0

Question

This is my code
<?xml version="1.0" encoding="utf-8"?><mx:WindowedApplication  xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontWeight="bold" textDecoration="
underline" creationComplete="preCheckForUpdate()">
 <mx:Script> 
<![CDATA[
import air.update.ApplicationUpdater; 
import flash.events.ErrorEvent; 
import flash.events.IOErrorEvent; 
import air.update.ApplicationUpdaterUI; 
import air.update.events.UpdateEvent; 
import mx.controls.Alert; 
private var appUpdater:ApplicationUpdater = new ApplicationUpdater(); 
private var updateXMLURL:String = "http://localhost/AutoUpdate1/update.xml"; 
// Pre-read the server-side XML file to look for <force>yes</force>  
private function preCheckForUpdate():void{
try{
var loader:URLLoader = new URLLoader(); 
loader.addEventListener(Event.COMPLETE, checkForUpdate);
loader.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
// Just in case we can't read the update.xml loader.load(
new URLRequest(updateXMLURL));}
catch(e:Error){
Alert.show(e.toString());
private function checkForUpdate(event:Event):void{
try{
setApplicationVersion();
// Find the current version so we can show it below  
var myXML:XML = new XML(event.target.data); 
namespace items = "http://ns.adobe.com/air/framework/update/description/2.0beta2"; 
use namespace items; 
var forceUpdate:String = myXML.force; 
appUpdater.updateURL = updateXMLURL;
// Server-side XML file describing update  
//appUpdater.isCheckForUpdateVisible = false; // We won't ask permission to check for an update  
// If <force>yes</force> was found above, turn off the download and install dialogs  
/* if(forceUpdate.toLowerCase() == "yes") { 
appUpdater.isDownloadUpdateVisible = false;
appUpdater.isInstallUpdateVisible = false;
appUpdater.addEventListener(UpdateEvent.INITIALIZED, onUpdate);
// Once initialized, run onUpdate  
//appUpdater.addEventListener(ErrorEvent.ERROR, onError); // If something goes wrong, run onError  
appUpdater.initialize();
// Initialize the update framework}
catch(e:Error){
Alert.show(e.toString());
private function onError(event:ErrorEvent):void { 
Alert.show(event.toString());
private function onIOError(event:IOErrorEvent):void 
Alert.show(event.toString());
trace("Error loading URL.");}
private function onUpdate(event:UpdateEvent):void{
try{
appUpdater.checkNow();
// Go check for an update now}
catch(e:Error){
Alert.show(e.toString());
// Find the current version for our Label below  
private function setApplicationVersion():void{
try{
var appXML:XML = NativeApplication.nativeApplication.applicationDescriptor; 
var ns:Namespace = appXML.namespace(); ver.text =
"Current version is " + appXML.ns::version;}
catch(e:Error){
Alert.show(e.toString());
]]>
</mx:Script> 
<mx:WipeRight  id="slowright" duration="1000"/>
 <mx:Label x="93" y="135" text="Welcome to Rapidcare" fontSize="36" fontFamily="Times New Roman" color="#3C0B1F"creationCompleteEffect="
{slowright}" height="89"/>
 <mx:Label x="178" y="186" color="#F81908" fontSize="36" fontWeight="bold" textDecoration="normal" id="ver"/>
 <mx:Label x="93" y="279" text="Hai"/>
 </mx:WindowedApplication>
IT throws an error in this appUpdater.checkNow();
Error #2044: Unhandled updateError:. text=unknown update version
Please any provide solution for this
Regards,
Jayagopal

Answer 1

Hi Jayagopal,
The error you are getting might be from the fact that you are using an invalid namespace within your update.xml. Can you make sure that the specified namespace from the update.xml is the same with the following one xmlns="http://ns.adobe.com/air/framework/update/description/1.0" and then then try to reproduce this issue?
Here is the update.xml which i've used when trying to reproduce your issue:
<?xml version="1.0" encoding="utf-8"?>
<update xmlns="http://ns.adobe.com/air/framework/update/description/1.0">
  <version>v1.1</version>
  <url>http://localhost/AutoUpdate1/update.air</url>
  <description><![CDATA[
Version 1.1. This new version includes:
    * Feature 1
    * Feature 2
    * Feature 3       
  ]]></description>
</update>
If you can still reproduce this issue can you also attach your update.xml or host your air app and update.xml on an external server from where I could access them?
Hope this helps you,
-Catalin