minctoraw: 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/minctoraw - from package: minc-tools

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

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