After updating the latest Android ADT tool, it appears TypeError: argument of type ‘NoneType’ is not iterable.

Solution:

Copy everything under build-tool/17.0.0/ to the platform-tools directory.

https://developer.appcelerator.com/question/152497/titanium-sdk-310-error-typeerror-argument-of-type-nonetype-is-not-iterable-on-building-android-app