vtkxform: 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/vtkxform - from package: cmtk

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

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