mincwindow: 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/mincwindow - from package: minc-tools

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

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