hbpldecode: 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/hbpldecode - from package: printer-driver-foo2zjs

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

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