title: error 1001 an exception occurred during the commit phase
body: <p>I have an </p>
  
  <blockquote>
    <p>"Error 1001 An Exception occurred during the commit phase of the
    installation. This exception will be ignored and installation will
    continue. However, the application might not function correctly after
    installation is complete"</p>
  </blockquote>
  
  <p>while installing a program called "map-pit"
  I am running an OS win 7 64 bit. I tried installing it on windows x-p and it worked!!<br>
  what could cause the problem?</p>