I got it to work no problem, with current SVN, but this is a GEM map that is waaay to big for C2C, it takes 4-5 minutes just for 1 turn.
well, pls post your win + civ ini and game settings, so I can compare it with mine, and where I can get the SVN version from.
I checked the logs more, and mass of unit grafics files fail to load, so that I think there are too much units with different grafics. If so, its not a primary problem of map size, but of amount of different units all with different grafic. Maybe limit unit amount with different grafic may help more than reduce amount of civs or map sitze.
Edit:
I just now downloaded and installed SVN and last C2C from there (deleted the former C2C complete and replaced it new) and try again the sav in case.
You say, it gives no crash with your SVN when "next turn", but I get crash with "memory allocation error", no dump file created, and in log mass of files (so, what on your comp is different to mine, that you - having same version of SVN - get no crash but I get one?). The need to processing time is no subject here, its the crash with memory allocation error only:
Traceback (most recent call last):
File "CvScreensInterface", line 1326, in handleInput
File "CvMainInterface", line 6763, in handleInput
File "BugOptionsScreen", line 42, in showOptionsScreen
File "BugOptionsScreen", line 142, in interfaceScreen
File "BugOptionsScreen", line 149, in createTabs
File "ANDAutomationsTab", line 269, in create
UnicodeDecodeError: 'ascii' codec can't decode byte 0xdf in position 4: ordinal not in range(128)
ERR: Python function handleInput failed, module CvScreensInterface
...much more ...
RESMGR: Texture AnimalTeeth.dds failed to load
RESMGR: Texture companion_cavalry_128.dds failed to load
RESMGR: Texture companion_cavalry_128_gloss.dds failed to load
RESMGR: Failed loading file Art/Terrain/Resources/Almond/Banana_Master_Improved_Worked.kf. Reason: (code:1) Cannot open file.
... and much more