PTuncrop: 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/PTuncrop - from package: libpano13-bin

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

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