[cups.general] How to specify absolute path to printer

[Bernard Higonnet]

Hello,

I have a Lexmark Z31 printer which I should be able to use with 
Foomatic/lxm3200-tweaked.

How do I specify an absolute path to printer?

In my case, if I use

LexmarkZ31 "Backend /usr/local/libexec/cups/backend//dev/lpt0 does not exist!"
        Description: LexmarkZ31
Location:
Printer Driver: Lexmark Z31 Foomatic/lxm3200-tweaked (recommended)
Printer State: stopped, accepting jobs, published.
Device URI: /dev/lpt0

trying to print the test page brings down cupsd...

TIA
Bernard Higonnet