mppcheck: command not found

Have You tried accessing the binary with the full path?

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/mppcheck - from package: argyll

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