# Processing won’t start at all

**URL:** <https://discourse.processing.org/t/processing-won-t-start-at-all/16010>\
**Category:** Processing\
**Created:** [December 1, 2019, 9:41am UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010 "2019-12-01T09:41:21Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Grimtin10](https://avatars.discourse-cdn.com/v4/letter/g/e47c2d/32.png) [@Grimtin10](https://discourse.processing.org/u/Grimtin10)\
**Post date:** [December 1, 2019, 9:41am UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/1 "2019-12-01T09:41:21Z")

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In the .err file it says

> “Exception in thread “AWT-EventQueue-0” java.lang.NoClassDefFoundError: Could not initialize class sun.reflect.misc.MethodUtil”

Any help?

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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:** [December 1, 2019, 10:46am UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/2 "2019-12-01T10:46:59Z")

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that’s bad,  
but as this is not your first post i assume that is not a installation question?

is this a question about your code? not running ?  
can you post it here?

anyhow,  
first try to run any ready example to check your system is not damaged.

if it is system related

- what hardware / OS
- what processing version you used

just give more info…

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<div class="post-metadata">

**Author:** ![Grimtin10](https://avatars.discourse-cdn.com/v4/letter/g/e47c2d/32.png) [@Grimtin10](https://discourse.processing.org/u/Grimtin10)\
**Post date:** [December 1, 2019, 11:11am UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/3 "2019-12-01T11:11:23Z")

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Not a code problem, it just wont start. AT ALL.  
This is an error from processing itself, not from any of my code.  
Windows 7  
Processing 3.5.3

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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:** [December 1, 2019, 11:14am UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/4 "2019-12-01T11:14:02Z")

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so you might need a new installation?

-1- backup your sketch  
-2- delete ?Documents/processing-3.5.3/ dir  
-3- delete ?Documents/Processing/ dir  
-4- delete system dir  
c:\Users\ \< USER \> \AppData\Roaming\Processing\

* * *

you might do a test and start with -4- only  
and restart processing

* * *

make a new download of  
processing 3.5.3  
? you have win 7 32? 64 ? bit ?  
and choose processing accordingly

and unzip ( like to /Documents/ ) and start from there

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<div class="post-metadata">

**Author:** ![Grimtin10](https://avatars.discourse-cdn.com/v4/letter/g/e47c2d/32.png) [@Grimtin10](https://discourse.processing.org/u/Grimtin10)\
**Post date:** [December 1, 2019, 6:08pm UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/5 "2019-12-01T18:08:47Z")

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I did that 3 times. It never worked.  
Well, I guess I havent done a 100% fresh install.  
If this does work, thank you.

EDIT:  
It doesn’t work.

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<div class="post-metadata">

**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:** [December 1, 2019, 10:24pm UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/6 "2019-12-01T22:24:00Z")

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as you had processing working on ?this? system before,  
the question is what did you change that processing can not run anymore?

- update win ?
- install hardware or graphic driver

change anything?

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<div class="post-metadata">

**Author:** ![Grimtin10](https://avatars.discourse-cdn.com/v4/letter/g/e47c2d/32.png) [@Grimtin10](https://discourse.processing.org/u/Grimtin10)\
**Post date:** [December 1, 2019, 11:38pm UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/7 "2019-12-01T23:38:55Z")

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Nope, didn’t change anything.

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<div class="post-metadata">

**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:** [December 2, 2019, 12:53am UTC](https://discourse.processing.org/t/processing-won-t-start-at-all/16010/8 "2019-12-02T00:53:59Z")

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it is not up to me to say you need a new windows,

but possibly there is only a problem with your user,  
so a easy test would be to create a new windows user  
and install processing in that environment.

and this time you give a detailed report about every step / link / filename / path / mouseclick…  
how you start something and  
what you see then  
where you found what error file and post the full content,