mcwarp: 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/lib/cmtk/bin/mcwarp - from package: cmtk

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

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