Starting Mapper...Mapper initialization...Sprite manager initialization...Sprite manager initialization complete.SpriteManager::LoadFont - File <fnt_def.bmp> not found.Mapper initialization fail.
SpriteManager::LoadFont - File <fnt_def.bmp> not found.
I had the same problem, the problem was caused by 4/11 update important part, where you in order to run the game needed to rewrite "PatchDatPath=fonline.dat" to "PatchDatPath=faction.zip" in fonline.cfg. You need to revert this change. Unfortunately, this will make you unable to start the game. Unless you want to rewrite it everytime, you can create another copy of fonline client for mapper (Thx to Wichura for this info).
Somewhere around 1000x1000 hex, my mapper crashed. The biggest maps that 2238 is using have 300x300 hex (Klamath and NCR).