Process.pm: 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/lib/ace/bin/PerlACE/Process.pm - from package: mpc-ace

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

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