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Sys.WebForms.PageRequestManager ServerErrorException: An unknown error occurred while processing the

Posted By:      Posted Date: September 24, 2010    Points: 0   Category :ASP.Net


I am executing a SSRS 2008 report from report manager so it opens in a web browser. Since it is a big report it takes some time for execution. During this time i get an error icon on the left bottom of the web browser and the execution stops. When I click open the error icon to see the details it says,

"Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 12029." 

I have no clue what it is up to. Please help me on this.

The other relatively smaller reports are coming up successfully without any issue.

I am using SQL Server 2008 R2 64 bit ent. edition and the OS is Win Server 2003 64 bit SP 2.


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