title: what does "exited abnormally with signal 9: Killed: 9" mean
body: <p>How to read error codes which appear in the console? </p>
  
  <pre><code>&lt;Warning&gt;:  ....... -exited abnormally with signal 9: Killed: 9
  &lt;Warning&gt;:  ....... -1 err = Bad file descriptor (0x00000009)
  </code></pre>
  
  <p>Here what does <em>signal 9</em> mean, are there any more signals apart from it. Any documentation available for it.</p>
  
  <p>I get this kind of error, when a App. launched from Xcode is terminated by "Stop" button in Xcode toolbar.</p>
  
  <p><em>(Another way to get this error is , to press home button, then double tap home button and close the app.)</em></p>
  
  <p>Things even get worse when I launch the App. <strong>again</strong>, by tapping on App. icon on iPad Screen, App crashes and throws "libMobileGestalt copySystemVersionDictionaryValue: Could not lookup ReleaseType from system version dictionary"</p>
  
  <p>From finding on stack overflow , I see that this error is found in iOS 6 devices.</p>
  
  <p>This <a href="https://stackoverflow.com/questions/5959038/memory-leak-application-exited-with-signal-9">url states</a> that it's a SIGKILL error and it happens when "application is being terminated immediately, without any chance to clean up or catch and handle the signal"</p>
  
  <p>So, I think releasing objets in <code>-(void) didReceiveMemoryWarning</code> would not help to solve it, then what could be a definite solution?</p>
  
  <pre><code>- (void)didReceiveMemoryWarning 
  {
      [super didReceiveMemoryWarning];
  
      // Release objects.
      obj1 = nil;
      [view1 removeFromSuperView];
      view1 = nil;
      ...
  }
  </code></pre>