Clean Install, Full Campaign, CSA, Windows 8.1
This seems to happen almost exclusively during most 1862 turns. It has happened in every game I have started with he official 1.04 patch. The error appear during the AI phase, but when I click OK it continues on until just before the days start to play out. Reloading the game usually, but not always [then I need to restart multiple times], resumes at that point. Save & log provided.
PS - Don't forget, in the next patch, that you cannot reload previously saved games except via "Resume" - that, of course, means you can only continue the latest game.