TOPPAS: 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/TOPPAS - from package: topp

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

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