ofm2opl: 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/ofm2opl - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/ofm2opl - from package: texlive-binaries

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

Error in other languages:
ofm2opl: bevel nie gevind nie
ofm2opl: comandă negăsită
ofm2opl: comando não encontrado
ofm2opl: commande introuvable
ofm2opl: command not found
ofm2opl: käsku ei ole
ofm2opl: không tìm thấy lệnh
ofm2opl: komanda nerasta
ofm2opl: Kommando nicht gefunden.
ofm2opl: kommandot finns inte
ofm2opl: komut yok
ofm2opl: nie znaleziono polecenia
ofm2opl: níor aimsíodh an t-ordú
ofm2opl: no se encontró la orden
ofm2opl: no s'ha trobat l'ordre
ofm2opl: opdracht niet gevonden
ofm2opl: parancs nem található
ofm2opl: perintah tidak ditemukan
ofm2opl: príkaz nenájdený
ofm2opl: příkaz nenalezen
ofm2opl: команда не найдена
ofm2opl: командата не е открита
ofm2opl: 命令找不到
ofm2opl: コマンドが見つかりません