The message received from the server could not be parsed

Question

Hi All,

I am getting following error in asp.net webpage

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.

The scenario of my page is as following

1. I have asp.net page implement Ajax
2. User Control all code is inside update panel
3. Model popup extender at aspx page for User Control.

When i click button at aspx page popup appears, but further when i click button at user control for population of grid / click on radio button to fill dropdown list in both case above error comes.

Please help. I have seen many post but error still appears

Answer 1

Check out this link. It explains about why we get this error along with how to avoid it.

HTH