lua_call / lua_pcall inside a C Function - help!

["Jeff" <jeff@...>]

Hi all,

I'm using Lua 5.0, and have compiled the Lua code into my own project.
I've copied this function from a Lua tutorial somewhere, but lua_pcall (or
lua_call) refuses to work:

int luaadd ( int x, int y )
{
 int sum;

 /* the function name */
 lua_getglobal(L, "add");

 /* the first argument */
 lua_pushnumber(L, x);

 /* the second argument */
 lua_pushnumber(L, y);

 /* call the function with 2
    arguments, return 1 result */
 lua_pcall(L, 2, 1, 0);

 /* get the result */
 sum = (int)lua_tonumber(L, 1);
 lua_pop(L, 1);

 return sum;
}

When I get to lua_pcall, it basically falls over saying: attempt to call a
nil value. I get this in every instance I try to use lua_call or lua_pcall,
does anyone know why?

Thanks in advance,


Jeff.