lp-project-upload: 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/lp-project-upload - from package: lptools

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

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