osgcompositeviewer: 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/osgcompositeviewer - from package: openscenegraph

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

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