meep-mpich2: 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-mpich2 - from package: meep-mpich2

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

Error in other languages:
meep-mpich2: bevel nie gevind nie
meep-mpich2: comandă negăsită
meep-mpich2: comando não encontrado
meep-mpich2: commande introuvable
meep-mpich2: command not found
meep-mpich2: käsku ei ole
meep-mpich2: không tìm thấy lệnh
meep-mpich2: komanda nerasta
meep-mpich2: Kommando nicht gefunden.
meep-mpich2: kommandot finns inte
meep-mpich2: komut yok
meep-mpich2: nie znaleziono polecenia
meep-mpich2: níor aimsíodh an t-ordú
meep-mpich2: no se encontró la orden
meep-mpich2: no s'ha trobat l'ordre
meep-mpich2: opdracht niet gevonden
meep-mpich2: parancs nem található
meep-mpich2: perintah tidak ditemukan
meep-mpich2: príkaz nenájdený
meep-mpich2: příkaz nenalezen
meep-mpich2: команда не найдена
meep-mpich2: командата не е открита
meep-mpich2: 命令找不到
meep-mpich2: コマンドが見つかりません