gmerlin_visualizer_slave: 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/lib/x86_64-linux-gnu/gmerlin/bin/gmerlin_visualizer_slave - from package: libgmerlin-common

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

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