I always now play Gigantic map size. I also play with formations till the future tech era, so I know its not that.
I've found it will play if I hit Cntl-Shift-X or AI auto play.
But as soon as I hit the red button to end my turn, it'll crash. Always seems to crash AFTER the various cities have grown.
I've let the AI autoplay about 40 turns or so, then resumed control, it played for a number of turns, then went back to crashing again.
It's no biggie, its just a game I'm messing about with awaiting the final version. Its been through versions from 610 onwards I think.
This has only begun occurring from SVN 649. I have set the display to
Vanilla graphics, as this allows the game to cope with formations through the future era on Gigantic maps.
Plot list
PLE style
Vanilla draw method