Hi, I'm trying to track down: http://hackage.haskell.org/trac/hugs/ticket/29 The problem is in input.c, all the tests for $$ are written as: if (it==textRepeat && reading==KEYBOARD) ... The problem is that WinHugs doesn't pipe directly from the keyboard, its from a string buffer, i.e. reading == STRING. The possible values of reading are: #define NOTHING 0 /* what kind of input is being read?*/ #define KEYBOARD 1 /* - keyboard/console? */ #define SCRIPTFILE 2 /* - script file */ #define STRING 3 /* - string buffer? */ #define NOKEYBOARD 4 /* - standard input, but not a tty */ Without knowing the exact purpose of this check, its hard to know how to modify it for WinHugs. Can I just do reading == KEYBOARD || reading == STRING? Is there a particular reason that you can't use $$ in a SCRIPTFILE? Is reading == KEYBOARD required? Thanks Neil