dcopidl: 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 CentOS possible default full paths are:

/usr/bin/dcopidl - from package: kdelibs3-devel

You may install the required package with command yum install {package}

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