vflmktex: 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/vflmktex - from package: vflib3-bin

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