xml parsing on first load

Hi,

I am facing very strange issue in parsing xml. XML parsing fails to parse the xml response on the first loading of application in the ipad simulator as well as device. If I completely quit the application and if reopen it, it works!!!!

On the very first load of application I am getting the following error in the Titanium Appcelerator.

[WARN] Exception in event callback. {
expressionBeginOffset = 6394;
expressionCaretOffset = 6430;
expressionEndOffset = 6435;
line = 135;
message = "Result of expression 'xmlDoc.getElementsByTagName(\"Count\")' [null] is not an object.";
name = TypeError;
sourceId = 200357448;
sourceURL = "file://localhost/Users/manaday.mavani/Library/Application%20Support/iPhone%20Simulator/4.2/Applications/572185D6-43A5-458F-8D47-B5EE0A6D3C41/IRApp.app/Helper/Helper.js";
}
[WARN] Exception in event callback. {
expressionBeginOffset = 10019;
expressionCaretOffset = 10058;
expressionEndOffset = 10063;
line = 211;
message = "Result of expression 'xmldoc.getElementsByTagName(\"Snapshot\")' [null] is not an object.";
name = TypeError;
sourceId = 200357448;
sourceURL = "file://localhost/Users/manaday.mavani/Library/Application%20Support/iPhone%20Simulator/4.2/Applications/572185D6-43A5-458F-8D47-B5EE0A6D3C41/IRApp.app/Helper/Helper.js";
}

after quitting and relaunching the app works perfectly.

Thanks in advance.

the first thing I would do is call your handler on the onload event and not the onreadystatechange event, it is a common approach in most httpClient samples I have seen.

change this

snapshotxhr.onreadystatechange = handler;

to this

snapshotxhr.onload = handler;