dpmcopyd: command not found

Have You tried accessing the binary with the full path?

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 CentOS possible default full paths are:

/usr/sbin/dpmcopyd - from package: dpm-copy-server-mysql

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