Matlab unable to start

Windows 10 matlab 2016b and 2015a. Matlab will not start, it gets stuck in initializing, then busy. No changes, closed matlab and when I reopened it did this.

Answer 1

[Mohammad Haghighat]

Have you tried reinstalling it? Some necessary files might have been deleted for some reason.

[Michael Piedmonte]

That will be my last resort. Is there any known issues with the license manager that would cause this?

Answer 2

[Michael Piedmonte]

I'm back on the network and it started up fine. Before I was on the train with no connection. It seems like a problem with the license manager, but is fixed for me (for now). I have a stand-alone license.