SpectraFilterSqrtMower: 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/SpectraFilterSqrtMower - from package: topp

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

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