osgspheresegment: 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/osgspheresegment - from package: openscenegraph

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

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