Hi there, in H98: import System .... exCode <- System.system "java-parser -O -c input-file -o output-file" ... ls <- readFile "output-file" --sigbjorn ----- Original Message ----- From: Jason Smith To: glasgow-haskell-users@haskell.org Sent: Thursday, August 08, 2002 15:24 Subject: calling a seperate program and supplying command line args. How to basically? I've not had much luck finding much in the way of doc's in ghc on how to do this?...basically I have a compiler in haskell and I want to call a parser which is written in Java. The parser is a .NET binary, it spits out a text file containing the parse tree which I then suck up and do the usual compiler things with. I need to supply the java parser command line args i.e the file to parse etc.. Thanks heaps Jason.