title: SSRS subscription fails on rendering
body: <p>I have created a report an SSRS report in VS 2008, and running it on a Windows Server 2012.  When I run the report from Report Manager, it runs with no issues.  However, when I set up a scheduled subscription, I get the following error message: <strong>Failure sending mail: An error occurred during rendering of the report.  Mail will not be resent.</strong>  </p>
  
  <p>I have tried a number of Render Format options, including Excel, Word and CSV.  It has failed on each of these formats.  I did try the 'XML file with report data' option and the mail was sent.  I also used the 'Include Link' option without including the report and that worked. </p>
  
  <p>I have also set the Report Timeout option to 'Do not timeout report' in the Processing Options but still got the problem.  </p>
  
  <p>I am also running another report that is identical, except for the time interval and it runs fine.  The report that is failing captures weekly data, while the report that runs OK captures monthly data.</p>
  
  <p>Any ideas of what is going on with this report?  I have provided all the information I can think of, but if anyone needs anything additional, please let me know!  Thank you for your assistance!</p>