wbemgp: 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/wbemgp - from package: sblim-wbemcli

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

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