otp2ocp: 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/otp2ocp - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/otp2ocp - from package: texlive-binaries

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

Error in other languages:
otp2ocp: bevel nie gevind nie
otp2ocp: comandă negăsită
otp2ocp: comando não encontrado
otp2ocp: commande introuvable
otp2ocp: command not found
otp2ocp: käsku ei ole
otp2ocp: không tìm thấy lệnh
otp2ocp: komanda nerasta
otp2ocp: Kommando nicht gefunden.
otp2ocp: kommandot finns inte
otp2ocp: komut yok
otp2ocp: nie znaleziono polecenia
otp2ocp: níor aimsíodh an t-ordú
otp2ocp: no se encontró la orden
otp2ocp: no s'ha trobat l'ordre
otp2ocp: opdracht niet gevonden
otp2ocp: parancs nem található
otp2ocp: perintah tidak ditemukan
otp2ocp: príkaz nenájdený
otp2ocp: příkaz nenalezen
otp2ocp: команда не найдена
otp2ocp: командата не е открита
otp2ocp: 命令找不到
otp2ocp: コマンドが見つかりません