Was playing fine until the turn 51 bug, installed that fix. Then at turn 56 the game froze every time spain tried to fight muslim jihadis. installed 6.4 hoping it was a batchfix, now it cannot find a building.

17:51:07.345 [system.rpt] [always] CPU: SSE2
17:51:07.345 [system.rpt] [always] ==== system log start, build date: Feb 25 2008 version development ===
17:51:07.349 [system.io] [always] mounted pack packs/data_0.pack
17:51:07.349 [system.io] [always] mounted pack packs/data_1.pack
17:51:07.350 [system.io] [always] mounted pack packs/data_2.pack
17:51:07.351 [system.io] [always] mounted pack packs/data_3.pack
17:51:07.351 [system.io] [always] mounted pack packs/data_4.pack
17:51:07.352 [system.io] [always] mounted pack packs/localized.pack
17:51:34.493 [data.invalid] [error] Building load failed as id 'guild_st_johns_chapter_house' not recognised...

17:51:34.497 [data.invalid] [error] Building load failed as id 'guild_st_johns_chapter_house' not recognised...

17:51:55.360 [system.rpt] [error] Medieval 2: Total War encountered an unspecified error and will now exit.