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

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

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