Sys.WebForms.PageRequestManagerParserErrorException

When I try use Ajax ScriptManager to update panel, I have a trouble with an error :

Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.

After just I Rebuild all project and no see last error but found another error:

Uncaught Sys.ParameterCountException: Sys.ParameterCountException: Parameter count mismatch.

now i don’t know how to fix it

Categories: ASP.NET

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