CMCRevoke: 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/CMCRevoke - from package: pki-java-tools

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

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