# Could not load Java Mode, please reinstall processing?

**URL:** <https://discourse.processing.org/t/could-not-load-java-mode-please-reinstall-processing/41626>\
**Category:** Electronics (Arduino, etc.)\
**Created:** [April 5, 2023, 11:37am UTC](https://discourse.processing.org/t/could-not-load-java-mode-please-reinstall-processing/41626 "2023-04-05T11:37:30Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![llsummer](https://avatars.discourse-cdn.com/v4/letter/l/eb8c5e/32.png) [@llsummer](https://discourse.processing.org/u/llsummer)\
**Post date:** [April 5, 2023, 11:37am UTC](https://discourse.processing.org/t/could-not-load-java-mode-please-reinstall-processing/41626/1 "2023-04-05T11:37:30Z")

</div>

Hi all.  
The Arduino processing 4.2 on win11can’t be open and got error as title, how to fix please?  
Thanks  
adam

---

<div class="post-metadata">

**Author:** ![RichardDL](https://avatars.discourse-cdn.com/v4/letter/r/f475e1/32.png) [@RichardDL](https://discourse.processing.org/u/RichardDL)\
**Post date:** [April 5, 2023, 6:27pm UTC](https://discourse.processing.org/t/could-not-load-java-mode-please-reinstall-processing/41626/2 "2023-04-05T18:27:00Z")

</div>

Hello @llsummer Welcome to the forum. Please would you clarify what you’ve done, what works and what doesn’t. I regret I don’t have Windows-11 to try things myself, but it shouldn’t be much different from W10.

You’ve installed Processing 4.2?  
You can run the Processing IDE, from the menu chose Sketch, Run. - it makes a small window?  
What Arduino software have you installed? and what happened?