Error: Sys.ArgumentException: Cannot deserialize. The data does not correspond to valid JSON.

[v4rcool]

I am getting this error when I try to click spell checker in IE 7 inside RadEditor

A Runtime Error has occurred.
Do you wish to Debug?

Line:4723
Error: Sys.ArgumentException: Cannot deserialize. The data does not correspond to valid JSON.
Parameter name: data

I am using latest version of RadEditor dated Aug 2009. I tried all the solutions available on the forum.
Anyone else is having same kind of problem.

[Lini]

Hi,

Check if you have correctly registered the SpellCheckHandler.axd in your application's Web.config file. Try deleting the handler and adding it again using the control's smart tag. The problem might also be related to forms authentication - see the following forum thread for more information - http://www.telerik.com/community/forums/aspnet-ajax/spell/radspell-javascript-error.aspx

I would suggest using fiddler to check the actual response for the SpellCheckHandler.axd request and if there is a server exception there, use it to find the cause of the problem.

Best wishes,
Lini
the Telerik team

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[v4rcool]

I fixed my problem by adding that entry in web.config file

 

 

<add verb="*" validate="false" path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler, Telerik.Web.UI"/>

Thanks for the reply. I really appreciate.