title: xcode The document "..." could not be saved
body: <p>I use xcode 3.2.4 on snow leopard. Today when I tried to save a file on my project I get an error message saying: The document "nameOfFile.m" could not be saved. I tried reinstalling xcode but no luck. The file can be edited with other editors and I see the same behavior on all my projects as well as newly created projects. Any ideas?</p>
  
  <p><img src="https://i.stack.imgur.com/BSmEq.png" alt="Screenshot for error warning"></p>