title: Can't start emulator environment (error NAND: could not write file...file exists)
body: <p>I'm trying to start developing in android but have had problems setting up the development environment:
  I am running Ubuntu 11.04 and have installed Eclipse Juno  4.2.0. and have updated the android sdk tools to the latest version.</p>
  
  <p>When I try to run an android emulator I get the error "NAND: Could not write file...file exists". When searching on this error on answer said I needed to free up some space on my hard drive. I have since freed up a few Gig from the hard drive but I still get the same error. Another site said to delete all emulator environments and create new ones from scratch. I tried this but when I had just one environment listed in the avd manager and I try to delete it, and error message pops up that says I can't because the emulator is currently running. Even when I reboot the computer, open the avd manager and try to delete I still get the same error. 
  I have tried </p>
  
  <blockquote>
    <p>adb devices 
    to find the device that is running but no devices get listed.</p>
  </blockquote>
  
  <p>I get this error whether I am running the avd manager form Eclipse or from the command line. Does anyone know Why I am getting the NAND: Could not write file...file exists error or why I always get the message about the emulator running.</p>
  
  <p>Regards,</p>
  
  <p>John</p>