title: How to resolve Error = 1001 "No Fill" using Facebook Audience Network in android
body: <p>I have an Android version of my app and integrated FAN into my Application.
  It worked for some months but now it's displaying "<strong>NO FILL</strong>" </p>
  
  <pre><code>Error Domain=com.facebook.ads.sdk Code=**1001 "No fill"** 
  UserInfo={NSLocalizedDescription=**No fill**, 
  FBAdErrorDetailKey={ msg = "**No fill**"}}
  </code></pre>
  
  <p>And no FAN ad is shown. If I put a <strong>testing ID</strong> then it's displaying, but only on my device, not for another device.</p>
  
  <p>How to resolve this problem "No Fill"?</p>
  
  <pre><code>compile 'com.facebook.android:audience-network-sdk:4.+'
  </code></pre>
  
  <p>Mentioned in build.gradle
  I've seen many questions regarding this but unable to find an answer.</p>
  
  <p>I've already seen below links:</p>
  
  <ol>
  <li><p><a href="https://stackoverflow.com/questions/32664036/facebook-audiencenetwork-loaded-failure-no-fill-error-message-no-fill-what">Facebook AudienceNetwork loaded failure: No fill, Error Message &quot;No fill&quot;, what is the reason about FaceBook android Advertise?</a></p></li>
  <li><p><a href="https://stackoverflow.com/questions/36611887/facebook-audience-network-testing-on-test-flight-no-fill">facebook audience network testing on test flight No Fill</a></p></li>
  <li><p><a href="https://www.facebook.com/help/audiencenetwork/community/question/?id=105826316763239" rel="noreferrer">Audience Network iOS Ads Suddenly Become "No Fill"</a></p></li>
  <li><p><a href="https://www.facebook.com/business/help/community/question/?id=1494007767293505" rel="noreferrer">Facebook Audience Network returns "No fill"</a></p></li>
  <li><p><a href="https://developers.facebook.com/docs/audience-network/testing/" rel="noreferrer">Testing Audience Network Implementation</a></p></li>
  </ol>