meep-openmpi: 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/meep-openmpi - from package: meep-openmpi

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

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