SpectraFilterThresholdMower: 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

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/SpectraFilterThresholdMower - from package: topp

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