# Sketch running with no error but display window is blank, no output

**URL:** <https://discourse.processing.org/t/sketch-running-with-no-error-but-display-window-is-blank-no-output/16488>\
**Category:** Processing.py\
**Created:** [December 18, 2019, 5:15am UTC](https://discourse.processing.org/t/sketch-running-with-no-error-but-display-window-is-blank-no-output/16488 "2019-12-18T05:15:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![geom](https://avatars.discourse-cdn.com/v4/letter/g/e9bcb4/32.png) [@geom](https://discourse.processing.org/u/geom)\
**Post date:** [December 18, 2019, 5:15am UTC](https://discourse.processing.org/t/sketch-running-with-no-error-but-display-window-is-blank-no-output/16488/1 "2019-12-18T05:15:41Z")

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Hi everyone,  
I tried to run these codes from this topic-

> [@Generative floor plans with Permutation algorithm](https://discourse.processing.org/t/generative-floor-plans-with-permutation-algorithm/5140):
>
> Dear all, I would need your help to implement a permutation algorithm allowing the generation of building plans, that I’ve recently stumbled on while reading Professor Kostas Terzidis’ latest publication: [Permutation Design: Buildings, Texts and Contexts](https://books.google.com/books/about/Permutation_Design.html?id=govtnQEACAAJ&source=kp_book_description&redir_esc=y) (2014). CONTEXT Consider a site (b) that is divided into a grid system (a). Let’s also consider a list of spaces to be placed within the limits of the site ( c ) and an adjacency matrix to determine the placement conditions and neighboring …

Sketches are running both for py and java with no error as well display window show-up but with no result or graphics or output.  
I turned off internet connection so that firewall issue might not invade…so I did not stop firewall…but problem remain same.Could you help please? Thanks in advance.

 ![Capture](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/d/dbe31c99ac47ec095bb909e1f027409b07f4a8d1.png)

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**Author:** ![solub](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/solub/32/333_2.png) [@solub](https://discourse.processing.org/u/solub)\
**Post date:** [December 18, 2019, 6:17am UTC](https://discourse.processing.org/t/sketch-running-with-no-error-but-display-window-is-blank-no-output/16488/2 "2019-12-18T06:17:35Z")

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Hi @geom,

I just tested the sketch on a Windows and an Osx machine and it runs fine on both with Processing 3.5.3.

I am not well versed in this area but it might be an issue on your side (drivers compatibility, conflicting programs, installation error… ?) and as a first step I would suggest to reinstall both Processing and Python mode on your computer and see if the problem persists.

Hope someone more experienced can help you.

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<div class="post-metadata">

**Author:** ![geom](https://avatars.discourse-cdn.com/v4/letter/g/e9bcb4/32.png) [@geom](https://discourse.processing.org/u/geom)\
**Post date:** [December 18, 2019, 6:53am UTC](https://discourse.processing.org/t/sketch-running-with-no-error-but-display-window-is-blank-no-output/16488/3 "2019-12-18T06:53:38Z")

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Hi @solub  
Thanks for your reply. I will check your suggestions.