Using Paraview.simple externally Numpy error

Dear all,

I need to run paraview.simple externaly on my python distribution for extracting several results. I followed the instructions found online and added to pythonpath the following: /home/alexandrosstathas/PlotEnv/bin/ParaView-5.8.1-MPI-Linux-Python3.7-64bit/lib/python3.7/site-packages/
While paraview.simple loads fine, when I try to import numpy I get the following error:
Traceback (most recent call last):
File “/home/alexandrosstathas/PlotEnv/bin/ParaView-5.8.1-MPI-Linux-Python3.7-64bit/lib/python3.7/site-packages/numpy/core/”, line 40, in
from . import multiarray
File “/home/alexandrosstathas/PlotEnv/bin/ParaView-5.8.1-MPI-Linux-Python3.7-64bit/lib/python3.7/site-packages/numpy/core/”, line 12, in
from . import overrides
File “/home/alexandrosstathas/PlotEnv/bin/ParaView-5.8.1-MPI-Linux-Python3.7-64bit/lib/python3.7/site-packages/numpy/core/”, line 6, in
from numpy.core._multiarray_umath import (
ModuleNotFoundError: No module named ‘numpy.core._multiarray_umath’

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “”, line 1, in
File “/home/alexandrosstathas/PlotEnv/bin/ParaView-5.8.1-MPI-Linux-Python3.7-64bit/lib/python3.7/site-packages/numpy/”, line 142, in
from . import core
File “/home/alexandrosstathas/PlotEnv/bin/ParaView-5.8.1-MPI-Linux-Python3.7-64bit/lib/python3.7/site-packages/numpy/core/”, line 71, in
raise ImportError(msg)


Importing the multiarray numpy extension module failed. Most
likely you are trying to import a failed build of numpy.
Here is how to proceed:

  • If you’re working with a numpy git repository, try git clean -xdf
    (removes all files not under version control) and rebuild numpy.
  • If you are simply trying to use the numpy version that you have installed:
    your installation is broken - please reinstall numpy.
  • If you have already reinstalled and that did not fix the problem, then:
    1. Check that you are using the Python you expect (you’re using /home/alexandrosstathas/PlotEnv/bin/python),
      and that you have no directories in your PATH or PYTHONPATH that can
      interfere with the Python and numpy versions you’re trying to use.

    2. If (1) looks fine, you can open a new issue at Please include details on:

      • how you installed Python
      • how you installed numpy
      • your operating system
      • whether or not you have multiple versions of Python installed
      • if you built from source, your compiler versions and ideally a build log

      Note: this error has many possible causes, so please don’t comment on
      an existing issue about this - open a new one instead.

Original error was: No module named ‘numpy.core._multiarray_umath’

Based on the error above I looked for problems in numpy, but numpy installation works fine by itself. Next I searched for possible conflicts with my pythonpath but wasn’t able to locate any.

My Pythonpath is:
[’/home/alexandrosstathas’, ‘/home/alexandrosstathas/PlotEnv/bin/ParaView-5.8.1-MPI-Linux-Python3.7-64bit/lib/python3.7/site-packages’, ‘/usr/lib/’, ‘/usr/lib/python3.6’, ‘/usr/lib/python3.6/lib-dynload’, ‘/home/alexandrosstathas/PlotEnv/lib/python3.6/site-packages’]

I am using the last version of Paraview downloaded from the site. The installation of numpy,matplotlib etc was done via pip. Does anyone have an idea why the error appears?

The ParaView binaries ship with its own copies of these libraries. There’s no (supported) way to use external numpy or matplotlib.

Of course, one can always compile ParaView instead of using the binary.