title: Annoying "Errors running builder 'Android Pre Compiler' on project" dialog
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/14455018/eclipse-android-errors-running-builder-android-pre-compiler-on-project">Eclipse / Android : “Errors running builder ‘Android Pre Compiler’ on project…”</a>  </p>
  </blockquote>
  
  
  
  <p>I keep getting the following error pop-up every now and then on my Android project on Eclipse 4.2.1:</p>
  
  <pre><code>Title:
  'Building workspace has encountered a problem. Errors occurred during the build.
  
  Message:
  Errors running builder 'Android Pre Compiler' on project 'xxxx'. java.lang.NullPointerException
  </code></pre>
  
  <p>FYI, my project has .svn repositories and uses 4 external libraries (that seem to be fine, no errors). I'm using Android 4.2.</p>
  
  <p>What could be the issue here? :(</p>