Most of these posts are related to 0.299 so it could be something different in 0.300. So the following information may be irrelevant.
Nop, I had no units, only my Sov. However my Sov was garrisoned in my city for a couple of turns, so in short: I had no moving units at all. This is why I've said in my OP post, that this problem has nothing to do with the actions of the human player.
If the problem is related to pathting it may also hang on npc units not just the player's units.
What I'm wondering if a few of us on the forum were lucky enough to move the unit that was stuck trying to path and thus holding up the turn button.
If an npc is having trouble pathing, obviously the player can't do anything about it and the game hangs or crashes.
Here are the other posts similar in nature:
egable
I've noticed the same issue. Any time my turn button grayed out and the whole game did NOT freeze entirely, I just had to find a character that was stuck while moving and move it manually. Game proceeded as normal at that point. Occasionally, the button would get grayed out and the whole game would stop responding, but that is obviously a different issue.
Orvidos
The two things I've noticed hanging on End Turn are:
- If a Sovereign has a move order queued for the next turn, and does not execute it, and you end turn it was supposed to move on, it will hang. I've had what appears to be this happen at least 4 times.
- Ending turns too quickly. I don't know if there's something I'm not noticing when this one happens. It's usually in rapid succession, and hasn't happened since things stopped taking 70+ turns to build. (I can 'play' at a normal pace now.)
Either time, it actually hard-locks the computer, forcing me to restart via the power button.
PoPsuX
I've so far noticed two other repies with similar conclusion: The Pioneer has to be the "victim" of this end turn button hang - bug. This happend once to me. My pioneer was on "auto explore". And all over a sudden he got stuck... Or the end turn button was grayed out.. I tried to figure out what it could be. And i re-directed my pioneer to another spot and "boom", the end-turn button was activated again!
Darvroth
hang up while trying to move through a player controlled city (clicking on the city resolves the hang up). In fact clicking on each city or unit with a hang up seems to resolve the hang up.
Darvroth
I experienced 2 complete lock ups which were recoverable by restarting the game and reloading a save, however, the auto save of the crash would not load and would lock up the computer again. In both instances the lock up was related to giving a player controlled unit a long overland marching order (that involved going through a city at some point along the route). At several other times a recoverable lock up would occur; the unit with the issue was given a different movement order which cleared the lock up.