title: Unknown error: Unable to build: the file dx.jar was not loaded from the SDK folder
body: <p>When I try to run my Android project on Eclipse ADT, I see this in the Console:</p>
  
  <pre><code>[2017-03-24 15:34:41 - Dex Loader] Failed to load C:\Users\jaimemontoya\android-sdks\build-tools\26.0.0-preview\lib\dx.jar
  </code></pre>
  
  <p>[2017-03-24 15:34:41 - CouponClub] Unknown error: Unable to build: the file dx.jar was not loaded from the SDK folder!</p>
  
  <p><a href="https://i.stack.imgur.com/MGf68.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MGf68.png" alt="enter image description here"></a></p>
  
  <p>I am using Eclipse Neon.2 Release (4.6.2):</p>
  
  <p><a href="https://i.stack.imgur.com/P7kPt.png" rel="noreferrer"><img src="https://i.stack.imgur.com/P7kPt.png" alt="enter image description here"></a></p>
  
  <p>This is the package configuration I have as seen from the Android SDK Manager:</p>
  
  <p><a href="https://i.stack.imgur.com/DUSPD.png" rel="noreferrer"><img src="https://i.stack.imgur.com/DUSPD.png" alt="enter image description here"></a></p>
  
  <p>What I understand from that error is that it failed to load dx.jar because it is trying to load it "from the SDK folder". The message even uses an exclamation mark to say that! What SDK folder is it referring to? I thought in this case "C:\Users\jaimemontoya\android-sdks" would be considered an SDK folder. Do you know where it is expecting to find the "dx.jar" file?</p>