sc_tracediff: 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/sc_tracediff - from package: scamper

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

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