miramem: command not found

Have You tried accessing the binary with the full path?

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/miramem - from package: mira-assembler

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