xml2ps: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/xml2ps - from package: passepartout

You may install the required package with command apt-get install {package}

Error in other languages:
xml2ps: bevel nie gevind nie
xml2ps: comandă negăsită
xml2ps: comando não encontrado
xml2ps: commande introuvable
xml2ps: command not found
xml2ps: käsku ei ole
xml2ps: không tìm thấy lệnh
xml2ps: komanda nerasta
xml2ps: Kommando nicht gefunden.
xml2ps: kommandot finns inte
xml2ps: komut yok
xml2ps: nie znaleziono polecenia
xml2ps: níor aimsíodh an t-ordú
xml2ps: no se encontró la orden
xml2ps: no s'ha trobat l'ordre
xml2ps: opdracht niet gevonden
xml2ps: parancs nem található
xml2ps: perintah tidak ditemukan
xml2ps: príkaz nenájdený
xml2ps: příkaz nenalezen
xml2ps: команда не найдена
xml2ps: командата не е открита
xml2ps: 命令找不到
xml2ps: コマンドが見つかりません