title: Didn't find class "android.support.multidex.MultiDexApplication" on path: DexPathList
body: <p>I'm trying the new <a href="http://developer.android.com/tools/building/multidex.html">MultiDex Support</a> on my app and so far I've managed to compile my app correctly, but when running it, I get the following exception:</p>
  
  <pre class="lang-none prettyprint-override"><code>java.lang.RuntimeException: Unable to instantiate application android.support.multidex.MultiDexApplication: java.lang.ClassNotFoundException: Didn't find class "android.support.multidex.MultiDexApplication" on path: DexPathList[[zip file "/data/app/me.myapp.main-2.apk"],nativeLibraryDirectories=[/data/app-lib/me..main-2, /vendor/lib, /system/lib]]
      at android.app.LoadedApk.makeApplication(LoadedApk.java:507)
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4382)
      at android.app.ActivityThread.access$1500(ActivityThread.java:139)
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1270)
      at android.os.Handler.dispatchMessage(Handler.java:102)
      at android.os.Looper.loop(Looper.java:136)
      at android.app.ActivityThread.main(ActivityThread.java:5086)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:515)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
      at dalvik.system.NativeStart.main(Native Method)
  Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.multidex.MultiDexApplication" on path: DexPathList[[zip file "/data/app/me.myapp.main-2.apk"],nativeLibraryDirectories=[/data/app-lib/me.myapp.main-2, /vendor/lib, /system/lib]]
      at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
      at android.app.Instrumentation.newApplication(Instrumentation.java:998)
      at android.app.LoadedApk.makeApplication(LoadedApk.java:502)
  </code></pre>
  
  <p>This is my gradle file:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 21
      buildToolsVersion "21.1.0"
  
      defaultConfig {
          minSdkVersion 16
          targetSdkVersion 21
          multiDexEnabled true
      }
      buildTypes {
          release {
              minifyEnabled true
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
          debug {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
      packagingOptions {
          exclude 'META-INF/LICENSE.txt'
          exclude 'META-INF/NOTICE.txt'
      }
  }
  
  repositories {
      mavenCentral()
      mavenLocal()
  }
  
  
  dependencies {
      compile 'com.android.support:multidex:1.0.0'
      compile fileTree(include: ['*.jar'], dir: 'libs')
      compile 'com.android.support:support-v4:21.0.0'
      compile 'com.android.support:support-v13:21.0.0'
      compile 'com.android.support:appcompat-v7:21.0.0'
  }
  </code></pre>
  
  <p>And my AndroidManifest.xml:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;application
  android:name="android.support.multidex.MultiDexApplication"&gt;
  </code></pre>
  
  <p>I don't understand what the problem is. I think I'm doing everything according to the documentation. Is there something else i am missing? I made sure I had the latest support library and repo installed from the SDK manager.</p>