falpack: 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/falpack - from package: falconpl-dev

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

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