# Installation¶

## Troubleshooting Installation Errors¶

### NumPy¶

We now include NumPy code in Sverchok nodes, this means that you should have an up-to-date version of NumPy on your machine. Normally if you get your Blender from official site, precompiled NumPy will be included with Python, however this isn’t always the case. The windows builds on blender buildbot may contain a cut down version of NumPy due to the licenses under which it can be spread in compiled form. In any operation system if you have correct python version installed stand-alone, you may have not proper version of numpy itself.

If you get an error when enabling Sverchok the last lines of the error are important, if it mentions:

• ImportError: No module named ‘numpy’
• multiarray
• DLL failure
• Module use of python33.dll conflicts with this version of Python

then here are steps to fix that [1]:

Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) <edited>