cdfpvor: command not found

Have You tried accessing the binary with the full path?

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/cdfpvor - from package: cdftools

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