# Issue compiling software

**URL:** https://discourse.vtk.org/t/issue-compiling-software/8258
**Category:** Support
**Created:** [April 10, 2022, 11:33pm UTC](https://discourse.vtk.org/t/issue-compiling-software/8258 "2022-04-10T23:33:02Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![DomUoA](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/d/85e7bf/32.png) [@DomUoA](https://discourse.vtk.org/u/DomUoA)
#### Post date: [April 10, 2022, 11:33pm UTC](https://discourse.vtk.org/t/issue-compiling-software/8258/1 "2022-04-10T23:33:02Z")

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Hi there,

I am installing some software (compucell3d) using cmake and make. This sotware requires vtk. I have installed vtk 9.1 onto my linux machine. I am getting the following error:

 ![Screenshot from 2022-04-11 11-20-57](https://discourse.vtk.org/uploads/default/original/2X/d/d2837bc7bd05539d1acbd6c6709c90708a305994.png)

The “vtkpythonutil.h” header file is not installed with vtk 9.1. Any idea how to fix this? I have noticed that the binaries for the software I am installing uses vtk 8.2. Do I need to downgrade?

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### Author: ![mwestphal](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mwestphal/32/19_2.png) [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [April 11, 2022, 7:48am UTC](https://discourse.vtk.org/t/issue-compiling-software/8258/2 "2022-04-11T07:48:47Z")

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Hi @DomUoA,

> [@DomUoA](#):
>
> I have installed vtk 9.1 onto my linux machine.

How did you install it ? Using your package manager ? On which distribution ?

> I have noticed that the binaries for the software I am installing uses vtk 8.2. Do I need to downgrade?

Probably.

Best,

Best,

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### Author: ![dgobbi](https://discourse.vtk.org/user_avatar/discourse.vtk.org/dgobbi/32/18_2.png) [@dgobbi](https://discourse.vtk.org/u/dgobbi)
#### Post date: [April 11, 2022, 1:36pm UTC](https://discourse.vtk.org/t/issue-compiling-software/8258/3 "2022-04-11T13:36:05Z")

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If the software is looking for a Python header file, then be sure to install the vtk “dev” and “python” packages in addition to main “vtk” package.

The names of these packages will vary between different flavors of linux, but they will be something like `vtk-devel` and `python3-vtk` or `libvtk9-dev` and `python3-vtk9`.