You don't believe it, but this morning i loaded mission one more time, tried to save and.,... IT WORKS! Don't know what it was, but finally I could play this nice mission. Have completed it. Haven't found only 135 of 2538 loot. However, there was one moment in this mission, i don't like - I tried several times blackjacking two swordmen patrolling on the snowy streets, but can not knock them out, every time i hit them with my blackjack, they just turned around and killed me with their longswords( No matter that, in general, I enjoyed this mission, especially looking for the loot in the windows above)