I replaced descr_walls with old one from BI and it works fine for siege battle in normal city. I also replaced 2 entries in descr_strat with default_set but not special one I also have problem with (I saved two positions, one with siege of standard city and one with siege of special one). When I click battle button there is ctd in special city, before were no walls in siege battle in standard city (otherwise it worked).

How could I replace these special definitions with standard ones? I found one file where extra places were written down. I don't remember which txt file. When I deleted extra entries game did CTD when loading.