vflmkpk: 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/vflmkpk - from package: vflib3-bin

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

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