ogmsplit: 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 Debian possible default full paths are:

/usr/bin/ogmsplit - from package: ogmtools

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

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