I've seen this same pattern before, but I've no idea what's going on, I'm afraid.
Code:
00:36:54.901 [system.io] [info] exists: found mods/ebii/data/ui/custom_portraits/antiochus/portrait_dead.tga (from: D:\Medieval II Total War)
00:36:54.901 [system.io] [info] exists: found mods/ebii/data/ui/custom_portraits/antiochus/portrait_dead.tga (from: D:\Medieval II Total War)
00:36:54.902 [system.io] [info] exists: found mods/ebii/data/ui/custom_portraits/antiochus/portrait_dead.tga (from: D:\Medieval II Total War)
00:36:54.902 [system.io] [info] exists: found mods/ebii/data/ui/custom_portraits/antiochus/portrait_dead.tga (from: D:\Medieval II Total War)
00:36:54.902 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.903 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.903 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.903 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.903 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.903 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.903 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.903 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/002.tga (from: D:\Medieval II Total War)
00:36:54.906 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.906 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.906 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.906 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.906 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.906 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.907 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.907 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/008.tga (from: D:\Medieval II Total War)
00:36:54.907 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.907 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.908 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.908 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.908 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.908 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.908 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.908 [system.io] [info] exists: found mods/ebii/data/ui/cul_3/portraits/portraits/dead/057.tga (from: D:\Medieval II Total War)
00:36:54.909 [system.rpt] [error] Unspecified error. Please compress your error log in a zip format and upload it on the EBII technical help forum.
Do you have autosave enabled? It corrupts saved games.