pcl_morph: 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/pcl_morph - from package: pcl-tools

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

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