(ii) Or perhaps you´re running your libraries outside the first chunk Make sure, in your RMD, libraries must stay inside on the first chunk, because if libraries are not in the first chunk, RMD won´t recognize the libraries that you are working on.
Thanks to the good folks at Project Rocker I have sorted this out, at least for the moment.
Any issues appear to be related to how I was using the docker run command and issues pertaining to containers and images in my environment. Once I cleaned everything up and rebuilt my docker run invocation line in a very methodical fashion, things seemed to work.