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Error before page load in javascript

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Sanjeev
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Sanjeev asked on 24 Sep 2012, 10:18 AM
Hi,
I am using Telerik RAD controls(RAD Combo, RAD TextBox ,RAD Tab etc) inside update panel.  It was working fine just a few days back. Now I am getting error "Microsoft JScript runtime error: Sys.ArgumentUndefinedException: Value cannot be undefined.
Parameter name: id" before page load. I am using VS2010, framework 4.0 with Win-XP. It is always occurring on a single page while others are working fine. I matched Telerik version from Web.config and in Reference added (not using GAC here). I'd also added AJAXToolkit dll and added in reference of project. I also tried with removing Update Panel but got same result.

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Andrey
Telerik team
answered on 27 Sep 2012, 07:03 AM
Hello,

Could you share the full page source code along with the code-behind file content? Thus all the people who want to help you will have better understanding of your case.

Greetings,
Andrey
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Sanjeev
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answered on 28 Sep 2012, 09:32 AM
Thanks a lot for your reply.
I did 'Undo' everything to run project upto where it was working well. Later, I started to make required changes in steps and found that on 5th UC (User Control), I had applied EnableAriaSupport="true". for some Combo and TextBoxes which was cause of error. Temprarly, I removed this property to run my project and looking to fix it asap.
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Andrey
Telerik team
answered on 03 Oct 2012, 07:05 AM
Hello,

Could you isolate the issue into a sample project? Thus we will be able to test/debug it locally and provide solution to the issue a lot faster.

Regards,
Andrey
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed now.
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