title: Android Studio - Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
body: <p>i started getting this error that's preventing me from building my project</p>
  
  <pre><code>3:11:08 PM Gradle sync started
  3:11:12 PM Gradle sync completed
  3:11:13 PM Executing tasks: [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies]
  3:12:51 PM Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation: Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
  3:12:53 PM Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation: Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
  3:12:54 PM Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation: Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
  3:12:56 PM Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation: Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
  3:13:31 PM Gradle build finished in 2m 19s 29ms
  </code></pre>
  
  <p>in the event log. I've looked at other issues... invalidate caches/restart doesn't do anything nor does adding </p>
  
  <pre><code>android {
  aaptOptions.cruncherEnabled = false
  aaptOptions.useNewCruncher = false
  }
  </code></pre>
  
  <p>in my build.gradle.
  I looked at some other resources that said this error could be tied to bad image files? I added a .png recently but i already tried closing AS > deleting the picture > re-adding it to drawable > start AS > clean project. but that doesn't seem to help either. </p>
  
  <p>if anyone has any other ideas or solved this before i would greatly appreciate it....this has been holding me back from progressing for a while now. thanks!!</p>