mkbkv2hvf: 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/mkbkv2hvf - from package: vftool

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

Error in other languages:
mkbkv2hvf: bevel nie gevind nie
mkbkv2hvf: comandă negăsită
mkbkv2hvf: comando não encontrado
mkbkv2hvf: commande introuvable
mkbkv2hvf: command not found
mkbkv2hvf: käsku ei ole
mkbkv2hvf: không tìm thấy lệnh
mkbkv2hvf: komanda nerasta
mkbkv2hvf: Kommando nicht gefunden.
mkbkv2hvf: kommandot finns inte
mkbkv2hvf: komut yok
mkbkv2hvf: nie znaleziono polecenia
mkbkv2hvf: níor aimsíodh an t-ordú
mkbkv2hvf: no se encontró la orden
mkbkv2hvf: no s'ha trobat l'ordre
mkbkv2hvf: opdracht niet gevonden
mkbkv2hvf: parancs nem található
mkbkv2hvf: perintah tidak ditemukan
mkbkv2hvf: príkaz nenájdený
mkbkv2hvf: příkaz nenalezen
mkbkv2hvf: команда не найдена
mkbkv2hvf: командата не е открита
mkbkv2hvf: 命令找不到
mkbkv2hvf: コマンドが見つかりません