title: SSRS - Severe error message when running stored procedure
body: <p>I have a report that runs a stored procedure that takes about an hour to run.</p>
  
  <p>After about 30 minutes I get this error message on the report body:</p>
  
  <pre><code>An error has occurred during report processing.
  Query execution failed for data set 'DEV'.
  A severe error occurred on the current command. The results, if any, should be discarded. Operation cancelled by user. 
  </code></pre>
  
  <p>The same stored procedure runs fine when I run it from SQL Server management studio (with the same login credentials the report runs under).</p>
  
  <p>Any ideas what could be causing this?  I tried increasing the timeout value on the report but that didn't help.</p>