You’ll get Error 74 if you attempt to deserialize an array which has an empty array definition. A simple example is shown below: <img width="966" alt="screen shot 2017-06-21 at 4 02 18 pm" src="https://user-images.githubusercontent.com/7451453/27406731-7933d4da-569b-11e7-8586-2580a7a49a24.png">