osgblendequation: 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/osgblendequation - from package: openscenegraph

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

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