mca2edf: 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/mca2edf - from package: pymca

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

Error in other languages:
mca2edf: bevel nie gevind nie
mca2edf: comandă negăsită
mca2edf: comando não encontrado
mca2edf: commande introuvable
mca2edf: command not found
mca2edf: käsku ei ole
mca2edf: không tìm thấy lệnh
mca2edf: komanda nerasta
mca2edf: Kommando nicht gefunden.
mca2edf: kommandot finns inte
mca2edf: komut yok
mca2edf: nie znaleziono polecenia
mca2edf: níor aimsíodh an t-ordú
mca2edf: no se encontró la orden
mca2edf: no s'ha trobat l'ordre
mca2edf: opdracht niet gevonden
mca2edf: parancs nem található
mca2edf: perintah tidak ditemukan
mca2edf: príkaz nenájdený
mca2edf: příkaz nenalezen
mca2edf: команда не найдена
mca2edf: командата не е открита
mca2edf: 命令找不到
mca2edf: コマンドが見つかりません