If you want, you can type auto_win: attacker (or "defender", if you're defending) to automaticly win battles. Even if you would have won the battle "fairly" in autocalc anyway it seems to cause less casualties for you this way.

I basicly use auto_win in two cases:
1) when loading a particular battle always crashes, and I'm certain that I would win that battle if I could play it
2) if I had just won a lengthy battle, and the game crashes immediately afterwards.

Technicly auto_win is a cheat code, but I have no qualms about using it in those two scenarios. Like I said, it gives you lower casualties on your side than regular auto-calc; but your casualties likely would have been lower still if you had been able to actually play the battle.