ops2c: 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/ops2c - from package: parrot-devel

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

On Debian possible default full paths are:

/usr/bin/ops2c - from package: parrot-devel

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

Error in other languages:
ops2c: bevel nie gevind nie
ops2c: comandă negăsită
ops2c: comando não encontrado
ops2c: commande introuvable
ops2c: command not found
ops2c: käsku ei ole
ops2c: không tìm thấy lệnh
ops2c: komanda nerasta
ops2c: Kommando nicht gefunden.
ops2c: kommandot finns inte
ops2c: komut yok
ops2c: nie znaleziono polecenia
ops2c: níor aimsíodh an t-ordú
ops2c: no se encontró la orden
ops2c: no s'ha trobat l'ordre
ops2c: opdracht niet gevonden
ops2c: parancs nem található
ops2c: perintah tidak ditemukan
ops2c: príkaz nenájdený
ops2c: příkaz nenalezen
ops2c: команда не найдена
ops2c: командата не е открита
ops2c: 命令找不到
ops2c: コマンドが見つかりません