cdfvFWov: 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/cdfvFWov - from package: cdftools

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

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