TOPPView: 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/TOPPView - from package: topp

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

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