warpx: 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/warpx - from package: cmtk

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

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