FATAL ERROR  
[error]Expression    : fatal error 
[error]Function      : CScriptEngine::lua_error 
[error]File          : script_engine.cpp 
[error]Line          : 79 
[error]Description   : <no expression> 
[error]Arguments     : LUA error: ...\op-2.1\gamedata\scripts\binders\bind_monster.script:538: attempt to call method 'monster_death' (a nil value)