vtkWrapPythonInit: 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 CentOS possible default full paths are:

/usr/bin/vtkWrapPythonInit - from package: vtk-python

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/vtkWrapPythonInit - from package: python-vtk

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

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