Plouffe: 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:

/var/lib/wims/public_html/bin/Plouffe - from package: wims

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