Error : Maximum request length exceeded in SSRS Report Preview

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C:\Program Files\Microsoft SQL Server\MSSQL.2\Reporting Services\ReportServer

Find the web.config file for your reporting services instance, open it up, and track down the line that looks something like this

executionTimeout = “9000” />

Now just add a max request length attribute in there to fix the problem, adjust your size as needed.  This is 5meg.

executionTimeout = “9000” maxRequestLength=”500000″ />

And now you’ll need to restart IIS.  start->run->”iisreset”

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