Failed to build project with Android studio

Question

Check all your build.gradle files whether they are using the 19.0.x version or not.

buildToolsVersion will be defined under the android tag inside the build.gradle file, like this:

android {
     compileSdkVersion 19
     buildToolsVersion '19.0.3'

     // Other Configuration
}

You can find a list of versions for the Android Build Tools here as well as in the SDK Manager.