# Processing isn't running (java.lang.NullPointerExcpetion)

**URL:** <https://discourse.processing.org/t/processing-isnt-running-java-lang-nullpointerexcpetion/14773>\
**Category:** Processing\
**Created:** [October 18, 2019, 1:50am UTC](https://discourse.processing.org/t/processing-isnt-running-java-lang-nullpointerexcpetion/14773 "2019-10-18T01:50:53Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![kll](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/kll/32/964_2.png) [@kll](https://discourse.processing.org/u/kll)\
**Post date:** [October 18, 2019, 2:13am UTC](https://discourse.processing.org/t/processing-isnt-running-java-lang-nullpointerexcpetion/14773/2 "2019-10-18T02:13:46Z")

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> [@zayeh](#):
>
> I’ve got java installed, latest version and all that

processing comes with own JAVA (8)

[http://download.processing.org/processing-3.5.3-windows64.zip](http://download.processing.org/processing-3.5.3-windows64.zip)

* * *

> -a- clean up:  
> **-a1- backup your sketch**  
> -a2- delete processing “install” dir ?like were you unzipped it?  
> c:\USERS\ \< USER \> \Documents\processing3.5.3.…  
> -a2- delete processing “sketch” dir  
> c:\Users\ \< USER \> \Documents\Processing.. with your sketch / libs / tools / modes  
> -a3- delete processing “system” dir  
> c:\Users\ \< USER \> \AppData\Roaming\Processing\

> -b- reinstall  
> -b1- unzip processing-3.5.3-windows64.zip to your “install” dir  
> -b2-start  
> c:\USERS\ \< USER \> \Documents\processing3.5.3\processing.exe  
> ( or a link to it ( like on desktop ) )  
> ++ you will be asked if to (allow) run JAVA  
> it creates again  
> c:\Users\ \< USER \> \Documents\Processing  
> c:\Users\ \< USER \> \AppData\Roaming\Processing  
> -b3- install libraries again ( like via contribution manager )  
> -b4- run simple example and a demanding ( for you graphic system )  
> / Files / Examples / Demos / Graphics / Ribbons  
> if there are problems ( GL ) might need update windows graphics driver  
> ( while recently we see also here something like a update warning where GL not work after update driver??? )

also see  
[Java error on startup when I launch Processing](https://discourse.processing.org/t/java-error-on-startup-when-i-launch-processing/14625) ,

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