Hello, I'm having problems trying to use hs-plugins (the darcs version, as I am on a 64-bit machine). The test suite mostly works without problems, but I can't get my own code to work. I put together a simple example which illustrates my problem: Main.hs ==================== module Main (Tree(..), Interface(..), main) where import Ptr import System.Plugins data Tree = Tree (Ptr Tree) data Interface = Interface { processTree :: Ptr Tree -> IO (Ptr Tree) } main = load "XYZuse.o" ["."] [] "resource" >>= (\(LoadSuccess _ v) -> (processTree v nullPtr)) ==================== XYZuse.hs ==================== module XYZuse (resource) where import Main resource = Interface { processTree = return } ==================== This is the output I get: ==================== $ ghc -c -o Main.o Main.hs $ ghc -c -o XYZuse.o XYZuse.hs $ ghci ___ ___ _ / _ \ /\ /\/ __(_) / /_\// /_/ / / | | GHC Interactive, version 6.6, for Haskell 98. / /_\\/ __ / /___| | http://www.haskell.org/ghc/ \____/\/ /_/\____/|_| Type :? for help. Loading package base ... linking ... done. Prelude> :l Main Ok, modules loaded: Main. Prelude Main> main Loading package Cabal-1.1.6 ... linking ... done. Loading package haskell98 ... linking ... done. Loading package haskell-src-1.0 ... linking ... done. Loading package plugins-1.0 ... linking ... done. GHCi runtime linker: fatal error: I found a duplicate definition for symbol Main_processTree_closure whilst processing object file ./Main.o This could be caused by: * Loading two different object files which export the same symbol * Specifying the same object file twice on the GHCi command line * An incorrect `package.conf' entry, causing some object to be loaded twice. GHCi cannot safely continue in this situation. Exiting now. Sorry. ==================== Thanks, -- Peter