Hi,
By perl environment i meant all the perl related files, pkgs that are used for the testing. 'tee' is an unix command. i m using cygwin to run unix commands and perl scripts in windows machine. 'tee' has no problem with other unix commands like "ls \ | tee transcript".
Comment on Re: IsKeyPressed not properly working with 'tee' command
In that case I would ask the cygwin people if I were you. My guess is that cygwin is probably taking control of the keyboard for the duration of the pipe - you would not notice that with ls.