gm-dump_schema: 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/sbin/gm-dump_schema - from package: gnumed-server

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

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