warp2ps: 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/lib/cmtk/bin/warp2ps - from package: cmtk

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

Error in other languages:
warp2ps: bevel nie gevind nie
warp2ps: comandă negăsită
warp2ps: comando não encontrado
warp2ps: commande introuvable
warp2ps: command not found
warp2ps: käsku ei ole
warp2ps: không tìm thấy lệnh
warp2ps: komanda nerasta
warp2ps: Kommando nicht gefunden.
warp2ps: kommandot finns inte
warp2ps: komut yok
warp2ps: nie znaleziono polecenia
warp2ps: níor aimsíodh an t-ordú
warp2ps: no se encontró la orden
warp2ps: no s'ha trobat l'ordre
warp2ps: opdracht niet gevonden
warp2ps: parancs nem található
warp2ps: perintah tidak ditemukan
warp2ps: príkaz nenájdený
warp2ps: příkaz nenalezen
warp2ps: команда не найдена
warp2ps: командата не е открита
warp2ps: 命令找不到
warp2ps: コマンドが見つかりません