# Errors While launching ITK

**URL:** https://discourse.itk.org/t/errors-while-launching-itk/6106
**Category:** Beginner Questions
**Tags:** itk, registration, rtk, cmake
**Created:** [July 27, 2023, 3:02pm UTC](https://discourse.itk.org/t/errors-while-launching-itk/6106 "2023-07-27T15:02:18Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Roro82](https://discourse.itk.org/letter_avatar_proxy/v4/letter/r/d78d45/32.png) [@Roro82](https://discourse.itk.org/u/Roro82)
#### Post date: [July 27, 2023, 3:02pm UTC](https://discourse.itk.org/t/errors-while-launching-itk/6106/1 "2023-07-27T15:02:18Z")

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Hello everyone,  
In order to use the RTK software, I tried to create the ITK software thanks to the CMake tool. Therefore, I uploaded the ITK sources in the CMake software after creating two distinct folders for the sources and the builds (as showed in tutorials on youtube,[ITK Install Tutorial - YouTube](https://youtu.be/f79joU6FTFQ)). However, I always get an error message (see capture below); what am I doing wrong? I also precise that I use an old version (the same as the one in the tutorial) but that was exactly the same problem with the brand new version.

 ![error cmake and ITK](https://discourse.itk.org/uploads/default/original/2X/3/324c643a61d427125b89dc0c3160d018ad6c1e2c.png)

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### Author: ![lassoan](https://discourse.itk.org/user_avatar/discourse.itk.org/lassoan/32/27_2.png) [@lassoan](https://discourse.itk.org/u/lassoan)
#### Post date: [July 27, 2023, 6:29pm UTC](https://discourse.itk.org/t/errors-while-launching-itk/6106/2 "2023-07-27T18:29:56Z")

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This is a very old CMake version. I would recommend to install the latest CMake version. Make sure you have also installed a build toolset (on Windows, the easiest is to use Visual Studio Community version).