OK, I detected it was my own fail: I was misleaded by the creation of the persistence file, which doesn't result from Readline.hs but simply from the rlwrap utility I earlier piped in before the ghci call. For those interested, the answer to the original question as usual from the man page: option --histsize N for rlwrap does the job. Maybe for a later discussion of using readline or some compatibility library instead of the rlwrap tool on ms windows systems I will post an extra message with a link. Bye. ---------- Forwarded message ---------- From: Daniel Kahlenberg Date: 2008/6/27 Subject: System.Console.Readline stifleHistory Question To: haskell-cafe@haskell.org Hello all, I'm learning Haskell and so very likely will have advantages from the history persistence feature added to the ghci haskell interpreter. It drives very well in my setup (the history file is growing and used), but I wanted to increase the number of saved history entries and now my question concerning ghci: In the ticket (http://hackage.haskell.org/trac/ghc/ticket/2050) associated with the feature, there's written that one can call stifleHistory in its dotghci file. Have done it like: :m +System.Console.Readline stifleHistory 300 :m -System.Console.Readline but now my ghci.exe says: Could not find module `System.Console.Readline': Use -v to see a list of the files searched for. <interactive>:1:0: Not in scope: `stifleHistory' `uname -r`: MINGW32_NT-5.1 CLE10 1.0.11(0.46/3/2) 2007-01-12 12:05 i686 Msys Do you have an idea, where I'm wrong? I'm starting my ghci session from zsh shell, provided by cygwin, wrapped in a tty emulator: $Drive\puttycyg\putty.exe -cygterm $Drive\zsh\bin\zsh.exe -p -c 'PATH=/cygdrive/h/zsh/bin:$PATH HOME=/cygdrive/h/.homedir rlwrap $(which ghcii.sh) -package-conf $Drive/.homedir/ghc/i386-mingw32-6.8.3/package.conf -read-dot-ghci' So I did not expect Readline not to work, but maybe the ghc system only sees the result from `uname -r` above?? Bye, Daniel.