pffexport: 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/pffexport - from package: pff-tools

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

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