vflmkvf: 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/vflmkvf - from package: vflib3-bin

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

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