PTroller: 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/PTroller - from package: libpano13-bin

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

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