mincmorph: 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/mincmorph - from package: minc-tools

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

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