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Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page.

Question asked by sandy_s on Feb 1, 2017
Latest reply on Feb 1, 2017 by sandy_s

Hi All,

 

I am developing a Nintex form and  have a lot of unbound fields and they were working. 
I tied an unbound form field for User control, suddenly found an error:

 

 

Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

 

I am getting error both in Chrome and Firefox Browser (latest version)

However, in Internet Explorer( IE 11), it works well.
Any idea, what could be the potential issue?

Any suggestions would be greatly appreciated.

 


Thanks in advance.    

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