pkcreatect: 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/pkcreatect - from package: pktools

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

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