hpcopy: 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/hpcopy - from package: hfsplus

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

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