Prototyper: 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/Prototyper - from package: clam-networkeditor

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

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