Message: 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...

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Hi All,

I am getting following error on my test environment:

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; GTB7.5; SLCC2; .NET CLR 2.0.50727; .NET4.0C; .NET4.0E; .NET CLR 3.5.30729; .NET CLR 3.0.30729)
Timestamp: Thu, 10 Jul 2014 12:47:37 UTC

Message: 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.
Details: Error parsing near '

<!DOCTYPE html P'.
Line: 938
Char: 13
Code: 0

The interesting thing is same piece of code works on my local environment but does not work on test.

I am using AjaxToolKit and UpdatePanel on the page. The button on click of which I am getting this is error is in updatepanel and i don't want to remove the same.

Please suggest.

Thanks,
Surendra

Posted 10-Jul-14 4:09am

Surendra Patil

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2014-07-10T09:41:00

Solution 1

Read the following articles. You will find the actual causes of this error.

1. Sys.WebForms.PageRequestManagerParserErrorException - what it is and how to avoid it[^]
2. Sys.WebForms.PageRequestManagerParserErrorException[^]

Posted 10-Jul-14 9:41am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)