Minor auto-ranks bug, quite similar to mentioned above by Cocyte and Vivalas:
Having not enough (or game thinks it is) ranks to your Ground Forces OOB, you'll have "Function #1752: Object reference not set to an instance of an object" every time you open GF or Economics windows.
That is not craching your game, nor very annoying (not appearing during time increment), still can produce more critical hiden bugs; that is, I see strange distribution of moral level in my GFs.
(Tested on Conventional, Real Stars, decimal separator is '.', easy to reproduce, from the start.)