I have two machines, one with MS Project 2013 Pro at this level: 15.0.4737.1003 and one at this level: 15.0.4727.1003 and linking is not working with the former. See below:
If I open the same file on the working machine, all is well, so it's not the file itself that is the problem. Any ideas? All was working well before the last batch of MS updates this week. Now sure what to check now... thx!