wbemmi: 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/wbemmi - from package: sblim-wbemcli

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