http://blogs.msdn.com/b/allendm/random bits, rants and ravesen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/allendm/archive/2012/09/08/empty-coverage-file-with-profiler-related-errors-in-the-event-logs.aspx#10350084Mon, 17 Sep 2012 12:06:51 GMT91d46819-8472-40ad-a661-2c78acb4018c:10350084Uğur Çiçekfidan<p>VS110COMNTOOLS environment variable should be removed after VS uninstallation or should be updated after installation. </p> <p>I had installed VS11 RC to &quot;D&quot; drive and had uninstalled before RTM installation. I installed VS11 RTM to &quot;C&quot; drive and the variable still shows &quot;D&quot; drive for Tools folder(!). That&#39;s why i could not run code coverage on visual studio for two weeks and saw the error that you mentioned above..</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10350084" width="1" height="1">