newprep: 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/lib/voxbo/bin/newprep - from package: voxbo

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

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