title: Unable to boot device because it cannot be located on disk
body: <p>The device's data is no longer present at <em>/Users/[user name]/Library/Developer/CoreSimulator/Devices/D651BCC7-29FD-4B91-82F6-E255E856EA2F/data.</em></p>
  
  <p>I uninstalled xcode 9 and installed xcode 9.1, but when run project, following message was shown:</p>
  
  <blockquote>
    <p>Unable to boot device because it cannot be located on disk.
    The device's data is no longer present at /Users/[user name]/Library/Developer/CoreSimulator/Devices/D651BCC7-29FD-4B91-82F6-E255E856EA2F/data.</p>
  </blockquote>
  
  <p>I found "Developer" folder, but cannot find "CoreSimulator" folder.</p>