mkocp: 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/mkocp - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/mkocp - from package: texlive-binaries

You may install the required package with command apt-get install {package}

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