CTD in year 157 BC

[Anti-hero]

I'm playing the Romans' campaign and I'm in the winter of 157 BC. As soon as I hit end turn, one of my characters finishes his move (walks a few steps on the map, as I have ordered it previously), then the active faction changes to Saka Rauka and the game CTDs. I can send you my savegame from the winter of 157 BC, because the forum won't allow me to attach it (filesize is 4,5 mb, the forum limit is 1.9mb). I have savegame backups of the last 12 game turns. I tried loading up from the winter of the previous year, 158, but the game inevitably CTDs again when I reach the winter of 157 BC. Check out my savegame and give some ideas pls. :)