mkmupfnt: 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/mkmupfnt - from package: mup

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