sgfsplit: 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/sgfsplit - from package: sgf2dg

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

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