http://blogs.msdn.com/b/analysisservices/archive/2012/10/01/more-on-multiple-powerpivot-versions.aspxThe previous blog post, Supporting Multiple PowerPivot Versions , contained a PowerShell script that has proven to be very helpful for us on the product team. We get a fair number of workbooks from a variety of sources created with many different versionsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/analysisservices/archive/2012/10/01/more-on-multiple-powerpivot-versions.aspx#10366608Wed, 07 Nov 2012 17:25:17 GMT91d46819-8472-40ad-a661-2c78acb4018c:10366608Paul<p>Thank you for the info! &nbsp;A word of caution to your readers: &nbsp;upgrading a password-protected workbook in Excel 2013 corrupted the PowerPivot model for me. &nbsp;After the upgrade, Excel asked to upgrade again, and then it failed with the error &quot;Element not found. (Exception from HRESULT: 0x8002802B (TYPE_E_ELEMENTNOTFOUND))&quot;. &nbsp;Be sure to remove the &quot;Encrypt with Password&quot; protection before upgrading the PowerPivot version!</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10366608" width="1" height="1">