ooo-thumbnailer: 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/ooo-thumbnailer - from package: ooo-thumbnailer

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

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