ocp-curses: 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

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 Debian possible default full paths are:

/usr/bin/ocp-curses - from package: opencubicplayer

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