meinproc: 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/bin/meinproc - from package: kdelibs3

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