landmark_warp: 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/landmark_warp - from package: plastimatch

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

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