wbemcmx: 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/wbemcmx - from package: sblim-wbemcli

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