LuaSocket - attempt to call field 'try' (a nil value) - lua

Question

Platform: (where Lua and LuaSocket are ported)
An embedded system using ARM 7 development board running 3rd party RTOS with TCP/IP stack.
What works:
Using Lua standard library such as "io" calls, print, assert, etc
sending UDP packets by using the udp = assert(socket.udp) method, assert(udp:send(something))
Problem:
When executing an example smtp lua script:
local smtp = require("socket.smtp")
from = "myEmail"
rcpt = {"<someOne's Email>"}
mesgt = { heasers = {someHeader}, body = "Hello World" }
r, e = smtp.send {
from = from,
rcpt = rcpt,
source = smtp.message(mesgt),
server = "someServer",
port = 25,
}
-- an error returns after execution:
-- lua\socket\smtp.lua:115: attempt to call field 'try' (a nil value)
-- Corresponding code in smtp.lua around line 115:
function open(server, port, create)
local tp = socket.try(tp.connect(server or SERVER, port or PORT,
TIMEOUT, create))
local s = base.setmetatable({tp = tp}, metat)
-- make sure tp is closed if we get an exception
s.try = socket.newtry(function()
s:close()
end)
return s
end
// Where try = newtry() in socket.lua and the corresponding C code is the same
// from the one provided with the library for UNIX:
static int global_newtry(lua_State *L) {
lua_settop(L, 1);
if (lua_isnil(L, 1)) lua_pushcfunction(L, do_nothing);
lua_pushcclosure(L, finalize, 1);
return 1;
}

Answer 1

Well, since the error says that "try is nil", then my best guess is that the C lib is not correctly, or not completely, linked to your Lua. This could be the result of a faulty installation, a missing lib, or something of that sort.