x42-scope: 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/x42-scope - from package: x42-plugins

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

Error in other languages:
x42-scope: bevel nie gevind nie
x42-scope: comandă negăsită
x42-scope: comando não encontrado
x42-scope: commande introuvable
x42-scope: command not found
x42-scope: käsku ei ole
x42-scope: không tìm thấy lệnh
x42-scope: komanda nerasta
x42-scope: Kommando nicht gefunden.
x42-scope: kommandot finns inte
x42-scope: komut yok
x42-scope: nie znaleziono polecenia
x42-scope: níor aimsíodh an t-ordú
x42-scope: no se encontró la orden
x42-scope: no s'ha trobat l'ordre
x42-scope: opdracht niet gevonden
x42-scope: parancs nem található
x42-scope: perintah tidak ditemukan
x42-scope: príkaz nenájdený
x42-scope: příkaz nenalezen
x42-scope: команда не найдена
x42-scope: командата не е открита
x42-scope: 命令找不到
x42-scope: コマンドが見つかりません