title: VS2013 or VS2015 shows "unspecified error"
body: <p>When I open my worked solution (after merge from other branch) VS2013 shows error message "unspecified error" and I cannot close the window (the error's dialog jumps each time when I close it).
  VS2012 opens the solution without error messages.
  I suspect issue related to TFS configuration.
  How can I found actual reason of the error?</p>
  
  <p><img src="https://i.stack.imgur.com/xANrq.png" alt="enter image description here"></p>