# The library is not installed

**URL:** https://discourse.processing.org/t/the-library-is-not-installed/45135
**Category:** Libraries
**Created:** [October 4, 2024, 10:33am UTC](https://discourse.processing.org/t/the-library-is-not-installed/45135 "2024-10-04T10:33:56Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![masoudhyudani](https://avatars.discourse-cdn.com/v4/letter/m/7c8e57/32.png) [@masoudhyudani](https://discourse.processing.org/u/masoudhyudani)
#### Post date: [October 4, 2024, 10:33am UTC](https://discourse.processing.org/t/the-library-is-not-installed/45135/1 "2024-10-04T10:33:56Z")

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Hello,

I would like to install the below library for Processing.

> **[GitHub - HCI-Lab-Saarland/MultiTouchKitUI](https://github.com/HCI-Lab-Saarland/MultiTouchKitUI)**
>
> Contribute to HCI-Lab-Saarland/MultiTouchKitUI development by creating an account on GitHub.

I extract the .zip file in the below address:

…\Documents\Processing\libraries

However, it does not recognize the library and shows me the below error:

_The package “MultiTouchKitUI” does not exist. You might be missing a library._

Any help would be greatly appreciated.

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<div class="post-metadata">

### Author: ![sableraph](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/sableraph/32/251_2.png) [@sableraph](https://discourse.processing.org/u/sableraph)
#### Post date: [October 4, 2024, 12:08pm UTC](https://discourse.processing.org/t/the-library-is-not-installed/45135/2 "2024-10-04T12:08:33Z")

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Hey @masoudhyudani, welcome to our community!

To get started, open the included `MTK_example.pde` file. Then drag `MultiTouchKitUI.jar` onto the Processing editor window—this will add it to a `code` folder in your sketch directory.

Also, make sure you install **blobDetection** and **OpenCV for Processing** from the Contribution Manager by navigating to: `Sketch > Import library... > Manage libraries...`.

Feel free to ask if you need more help!

Cheers,  
Raphaël