PILISSpectraGenerator: 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:

/usr/bin/PILISSpectraGenerator - from package: topp

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