title: Xcode warning: "Multiple build commands for output file"
body: <p>I am getting an error like this:</p>
  <blockquote>
  <p>[WARN]Warning: Multiple build commands for output file /Developer/B/Be/build/Release-iphonesimulator/BB.app/no.png</p>
  <p>[WARN]Warning: Multiple build commands for output file /Developer/B/Be/build/Release-iphonesimulator/BB.app/d.png</p>
  <p>[WARN]Warning: Multiple build commands for output file /Developer/B/Be/build/Release-iphonesimulator/BB.app/n.png</p>
  </blockquote>
  <p>But I have checked Xcode and I don't see any duplicates of such files at all. As <a href="http://lists.apple.com/archives/xcode-users/2006/Dec/msg00276.html" rel="noreferrer">this post</a> in the Apple Mailing Lists say, there are no duplicates.</p>