osgtexturecompression: 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/osgtexturecompression - from package: openscenegraph

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

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