If I change it to: im.png STDOUT # it works fine im.gif STDOUT # gives the following error ./fills.rb:31: undefined method `gif' for #<GD::Image:0x402504b0> (NameError) Is GIF no longer supported by the GD library? -Derrick > (offline mode: enter name=value pairs on standard input) > ^D > Content-Type: text/html > Content-Length: 195 > > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><HTML><HEAD> > <TITLE>This is a ruby test</TITLE></HEAD><BODY> > <H1>A Test ruby page</H1><BR><IMG SRC="/cgi-bin/fills.rb" > ALT=""></BODY></HTML> > pigeon% ruby > > The script "/cgi-bin/fills.rb" must just send as first line > "Content-Type: image/gif\n\n" before the output of the image > > Guy Decoux