mia-3dnonrigidreg: 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/mia-3dnonrigidreg - from package: mia-tools

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

Error in other languages:
mia-3dnonrigidreg: bevel nie gevind nie
mia-3dnonrigidreg: comandă negăsită
mia-3dnonrigidreg: comando não encontrado
mia-3dnonrigidreg: commande introuvable
mia-3dnonrigidreg: command not found
mia-3dnonrigidreg: käsku ei ole
mia-3dnonrigidreg: không tìm thấy lệnh
mia-3dnonrigidreg: komanda nerasta
mia-3dnonrigidreg: Kommando nicht gefunden.
mia-3dnonrigidreg: kommandot finns inte
mia-3dnonrigidreg: komut yok
mia-3dnonrigidreg: nie znaleziono polecenia
mia-3dnonrigidreg: níor aimsíodh an t-ordú
mia-3dnonrigidreg: no se encontró la orden
mia-3dnonrigidreg: no s'ha trobat l'ordre
mia-3dnonrigidreg: opdracht niet gevonden
mia-3dnonrigidreg: parancs nem található
mia-3dnonrigidreg: perintah tidak ditemukan
mia-3dnonrigidreg: príkaz nenájdený
mia-3dnonrigidreg: příkaz nenalezen
mia-3dnonrigidreg: команда не найдена
mia-3dnonrigidreg: командата не е открита
mia-3dnonrigidreg: 命令找不到
mia-3dnonrigidreg: コマンドが見つかりません