title: Quickfix list not opening file
body: <p>I am trying to use the quickfix list in gvim for my grep searches. This is on windows and I am using grep from cygwin by setting the following in my vimrc file:</p>
  
  <pre><code>set grepprg=C:/cygwin64/bin/grep
  </code></pre>
  
  <p>The grep works fine when I do:</p>
  
  <pre><code>:grep -R 'LOG' **/*cpp
  </code></pre>
  
  <p>I see the first match and do :copen to open the quick fixlist. Once I am there and want to go to a match hitting enter does nothing. Hitting Ctrl+W+Enter opens a new window that is blank. How do I make it so that when I hit enter or Ctrl+W+Enter it will open a window to the spot of the match?</p>