# Manually install Contributed Library fails

**URL:** https://discourse.processing.org/t/manually-install-contributed-library-fails/13881
**Category:** Processing
**Created:** [September 8, 2019, 5:12pm UTC](https://discourse.processing.org/t/manually-install-contributed-library-fails/13881 "2019-09-08T17:12:06Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![trob999](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@trob999](https://discourse.processing.org/u/trob999)
#### Post date: [September 8, 2019, 5:12pm UTC](https://discourse.processing.org/t/manually-install-contributed-library-fails/13881/1 "2019-09-08T17:12:06Z")

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Hi

I’m new to processing and like to “run” the “Background Subtraction Processing Demo” from Jorge Cardoso.on my win 10 with Processing 5.3.5

[http://jorgecardoso.eu/blog/index.php?/archives/105-Advanced-Background-Subtraction-Demo.html](http://jorgecardoso.eu/blog/index.php?/archives/105-Advanced-Background-Subtraction-Demo.html)

I failed to install the necessary library

```auto
* import unlekker.util.*;
* import unlekker.geom.*;
* import unlekker.data.*;
...

```

since i got the following error

> The package “unlekker.util” does not exist. You might be missing a library.

I downloaded

> <https://github.com/mariuswatz/modelbuilderMk2/blob/master/export/modelbuilderMk2-0162-20141111.zip>

and unziped it in the

C:\Users\dyz2yme\Documents\Processing\libraries folder and restarted processing as explained in [How to Install a Contributed Library · processing/processing Wiki · GitHub](https://github.com/processing/processing/wiki/How-to-Install-a-Contributed-Library), but …

My Sketchbook path is C:\Users\dyz2yme\Documents\Processing so I don’t know what I’m doing wrong

Can anybody help me?  
Thanks rob

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<div class="post-metadata">

### Author: ![trob999](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@trob999](https://discourse.processing.org/u/trob999)
#### Post date: [September 8, 2019, 5:19pm UTC](https://discourse.processing.org/t/manually-install-contributed-library-fails/13881/2 "2019-09-08T17:19:42Z")

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ok seems to be the wrong version of the library - found this one and it works

[https://github.com/downloads/mariuswatz/modelbuilder/Modelbuilder](https://github.com/downloads/mariuswatz/modelbuilder/Modelbuilder) v0007a03.zip

Now it says  
No library found for unlekker.geom

so i have to search for this one … is there any trick to find the right library?

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### Author: ![dan850](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@dan850](https://discourse.processing.org/u/dan850)
#### Post date: [September 8, 2019, 6:50pm UTC](https://discourse.processing.org/t/manually-install-contributed-library-fails/13881/3 "2019-09-08T18:50:14Z")

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Hi @trob999 so just to be sure, you’re using Processing 3.5 correct?

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### Author: ![trob999](https://avatars.discourse-cdn.com/v4/letter/t/b5ac83/32.png) [@trob999](https://discourse.processing.org/u/trob999)
#### Post date: [September 17, 2019, 3:58am UTC](https://discourse.processing.org/t/manually-install-contributed-library-fails/13881/4 "2019-09-17T03:58:25Z")

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sorry for the late answer - YES 3.5.3 … Thanks rob