I've been working through the current S/F introductory series:
Building and Deploying Applications on Force.com Free Edition (parts 1 to 3)
I'm sure this is a basic mistake but when I try deploying the sample app (via Inbound Change Set from within the Prod env) into production the Deploy Fails with the problem description as in the subject of this post.
I followed the series end to end and passed all the unit tests on 100% code coverage.
Does anyone have any suggestions as to what is causing this?