Adding sidearm (sword) to Triarii

[Siegebreaker]

I added the sword values to the Triarii in desc_unit.txt, then I added the fs_swordsman to the battle_model.txt, then I tested in custom battle, and the Triarii pulls up the swords in hand-to-hand combat (very cool), but the game crashes right afterwards, without letting me finish the battle.

Any ideas why is not working?

Thanks.