RadUpload Ajax callback error. Source url returned error: 12029

Asked By Anthony J Larson 20 points N/A Posted on - 03/08/2013

Hello. I am using Internet Explorer 5.0. I am getting this error and I am not able to continue further. If somebody knows about this please let me know. Thanks

Microsoft Internet Explorer

RadUpload Ajax callback error. Source url returned error: 12029

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Telerik.raduploadprogresshandler.ashx?radurid=23f24dca-3579-4ea5-96e0-a42cd332f567

Did you register the RadUploadProgressHandler in web.config?

Please, see the help for more details: Radupload for ASP.Net Ajax – configuration – RadUploadProgressHandler

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Answered By Duncan H Erazo 30 points N/A #175204

RadUpload Ajax callback error. Source url returned error: 12029

Hello Larson,

There are many reasons for receiving the error message “Callback Error,” and this is generally the solution:

1. Check that the RadUploadHttpModule and the RadUploadProgressHandler registration is correct.

You can do this if you access directly the handler’s URL from the browser in the following way:
http://mysite/Telerik. RadUploadProgressHandler.ashx
where mysite is your site’s URL.
If everything is registered correctly, you should see the following line:
var rawProgressData = {InProgress:false,RadProgressContextCustomCounters:false};

2. Check for other conflicting modules and handlers in the Web.config and the order in which they are registered.

3. Check for URL Rewriter rules which may redirect the call to Telerik. RadUploadProgressHandler.ashx to somewhere else.

I hope that this helps you.

Regards.

About Duncan H Erazo

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• Posted on - 03/28/2013
• Question Category: Internet Explorer