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Hello, I am statically linking my classes, and I realized I was using the wrong version of Lua (5.1) so it was working, but now I get these errors when I use Lua 5.2 error LNK2019: unresolved external symbol _lua_tonumber referenced error LNK2019: unresolved external symbol _lua_tointeger referenced error LNK2019: unresolved external symbol _lua_pcall error LNK2019: unresolved external symbol _luaL_loadfile referenced What is odd is that this is a snippet of what I am doing: lua_pushnumber(L, 1.1); lua_setglobal(L, "cppvar"); if (lua_pcall(L,0, LUA_MULTRET, 0)) { lua_pop(L,1); } lua_getglobal(L, "luavar"); double luavar = lua_tonumber(L,-1); lua_pop(L,1); lua_getglobal(L, "delaysecs"); delaySecs = lua_tointeger(L, -1); lua_pop(L, 1); So lua_pop, lua_getglobal, lush_pushnumber for example link fine, so it appears I am loading the correct library. Any idea what I may look at to see why this is messing up for me? This is how I build my lib files: cl /MD /O2 /W3 /c /DLUA_BUILD_AS_DLL /DLUA_COMPAT_MODULE *.c del *.o ren lua.obj lua.o ren luac.obj luac.o link /DLL /IMPLIB:lua5.2.lib /OUT:lua5.2.dll *.obj ren lua.o lua.obj lib /out:lua5.2-static.lib *.obj The difference between lua5.2.lib and 5.2-static.lib is the second one includes lua.obj |