'std::logic_error' PROBLEM in console

[humanforu]

Server crash with this error at cmd putty :

 Spoiler

terminate called after throwing an instance of 'std::logic_error' what(): basic_string::_S_construct null not valid

0x081bcd95 in quest::_regen_in_map (L=0x477dd040)
at questlua_global.cpp:1128
iMapIndex = 234
szFilename = {static npos = 4294967295,
_M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>},
_M_p = 0x477d4e5c "arya_dungeon_monster_cycle"}}
pkMap = <value optimized out>


and in Source this is 1128 line in questlua_global.cpp

 Spoiler

std::string szFilename(lua_tostring(L, 2));

im using that regen_in_map in a lua quest so i need to execute i.
Any possibility that it can be solved instead of bypassing?