Simon, Thanks for your help on this. I can't quite see how you got what you did. I followed the instructions in the cvs cheat sheet. 211 export CVSROOT=:pserver:anoncvs@glass.cse.ogi.edu:/cvs 213 cvs login 216 cvs co -r ghc-5-02 fpconfig 217 cd fptools/ 225 cvs checkout ghc 226 cvs checkout hslibs 229 cd hslibs/ 230 cd net 231 ls BSD.hs CGI.lhs CVS Makefile Socket.lhs SocketPrim.hs URI.hs cbits doc net.conf.in 234 cvs stat -v SocketPrim.hs =================================================================== File: SocketPrim.hs Status: Up-to-date Working revision: 1.1 Repository revision: 1.1 /cvs/fptools/hslibs/net/SocketPrim.hs,v Sticky Tag: (none) Sticky Date: (none) Sticky Options: (none) Existing Tags: before-newer-usagesp-frontier (revision: 1.1) I'm not sure what I did wrong but I don't seem to have a SocketPrim.hsc which is tagged with ghc-5-02-2. Dominic.