pfsoctavergb: 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/pfsoctavergb - from package: pfstools

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

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