Has there been a resolution to this issue? I am also having the same problem.
Having a back and forth with Support, they want my entire project sent over which is just not feesible (code and DB connections for financial systems)
I've restored from source control numerous times and still have the same issue. Next attempt will be to create a new project and see if I can map the same object.
However if as suggested the mapping file is corrupted on update then that counts out using TC14 untill they fix the problem.
I just converted one of our projects from TC12 to TC14... and the NameMapping file converted just fine and identifies and maps objects.
so... this is something unique to your situation. Unfortunately, to debug that, that's going to take some work with the support staff. I know from the past that they are willing to sign an NDA and other such agreements.
