PTblender: 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/PTblender - from package: libpano13-bin

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

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