Hi, I'm very lame in Haskell and compiling is very new to me. I have this problem when compilng a program that runs without error: MACKIE:/Volumes/DADOS/LESI/4 Ano/SSDI lpx$ ghc polish.hs compilation IS NOT required /usr/bin/ld: Undefined symbols: _ZCMain_main_closure ___stginit_ZCMain collect2: ld returned 1 exit status Do i need to add extra parameters to ghc? I need to know or thing... I need to obtain the arguments of a haskell program and then treat those arguments as a list inside the program example: polish [(1,(2,3)),(2,(3,4)),(3,(5,6))] And then i want to have that list inside the program. How can i do that? For now i have the following code: main :: IO () main = do args <- getArgs print args Well, i hope someone can answer me these questions. Many thx, Nuno Santos