Andy Galbraith, one of Ntirety’s DBAs, recently published a blog post about troubleshooting transactional replication publications on a relatively new pre-production server for a client.  As it turns out, old components from a previous migration were lingering.  The full story is available (along with tips) in Andy’s blog:

http://nebraskasql.blogspot.com/2017/04/where-left-those-old-components-in-my.html