smpiff: 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/smpiff - from package: libsimgrid-dev

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

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