title: The specified directory is not a valid GlassFish installation
body: <p>I'm trying to install GlassFish 4 with Eclipse on Windows 7 64bit. Everything goes fine, but when I try to set server root here's what happens (dir exists):</p>
  
  <p><img src="https://i.stack.imgur.com/chaBm.gif" alt="glassfish"></p>