osgstereomatch: 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/osgstereomatch - from package: openscenegraph

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

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