# Error on upload

**URL:** <https://forum.xod.io/t/error-on-upload/6108>\
**Category:** Uncategorized\
**Created:** [June 9, 2022, 4:23pm UTC](https://forum.xod.io/t/error-on-upload/6108 "2022-06-09T16:23:03Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mikerbrowne](https://avatars.discourse-cdn.com/v4/letter/m/7feea3/32.png) [@mikerbrowne](https://forum.xod.io/u/mikerbrowne)\
**Post date:** [June 9, 2022, 4:23pm UTC](https://forum.xod.io/t/error-on-upload/6108/1 "2022-06-09T16:23:04Z")

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Hi all,  
Can anybody help me to understand the following error message when trying to upload to a Uno? I am using Version 0.38.0 and the last upload was probably on 0.36.1 when all was ok.

 ![xodballV4.1.3](https://canada1.discourse-cdn.com/flex027/uploads/xod/original/2X/e/eb5761547bb6e8b298c77909fd90608fb46b5eaf.jpeg)  
[Complete system V4.1.3.xodball](https://forum.xod.io/uploads/short-url/cASAjJqz2L9M5bI6wY2Mf1JZegj.xodball) (63.6 KB)  
Any help would be much appreciated.

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**Author:** ![wayland](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.xod.io/wayland/32/1590_2.png) [@wayland](https://forum.xod.io/u/wayland)\
**Post date:** [June 9, 2022, 5:21pm UTC](https://forum.xod.io/t/error-on-upload/6108/2 "2022-06-09T17:21:24Z")

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I’m able to compile your patch for Arduino Uno using XOD 0.38.0. I suspect that on your system one of the built-in nodes is broken. The following post may contain the solution to your problem:

> [@Error; "Library contains error"](https://forum.xod.io/t/error-library-contains-error/5527/5):
>
> Since this is a built-in node, it should have been updated when you updated XOD. The fact that it wasn’t means you probably have a local copy of the library because you saved a change you made to one of the library nodes. You will need to find your ‘xod\_lib\_’ folder and remove or rename the xod folder in there. It is probably located in ‘c:\Users\<your\_login\>\xod\_lib\_\xod’. You will need to restart XOD after getting rid of this folder.

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**Author:** ![mikerbrowne](https://avatars.discourse-cdn.com/v4/letter/m/7feea3/32.png) [@mikerbrowne](https://forum.xod.io/u/mikerbrowne)\
**Post date:** [June 9, 2022, 5:51pm UTC](https://forum.xod.io/t/error-on-upload/6108/3 "2022-06-09T17:51:02Z")

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Thanks Matt for your (lightning quick!) response. Good to know that it is not a problem with my patch. I will delete the Xod folder, restart Xod and see if that sorts it.

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**Author:** ![mikerbrowne](https://avatars.discourse-cdn.com/v4/letter/m/7feea3/32.png) [@mikerbrowne](https://forum.xod.io/u/mikerbrowne)\
**Post date:** [June 16, 2022, 7:19pm UTC](https://forum.xod.io/t/error-on-upload/6108/4 "2022-06-16T19:19:52Z")

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Thanks again Matt, the info you supplied sorted the problem.

Also I will take this opportunity to thank you for all the work you do for us XODers.

I am using your avr-sleep library which works a charm controlling some LED’s in a battery driven application. I am able to control both the sequencing of the LED’s as well as the Off/On function with a single push-button.

Kind regards  
Mike

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**Author:** ![system](https://canada1.discourse-cdn.com/flex027/uploads/xod/original/1X/eb7348baa04192c2ef932d1db54d44f09f8a7888.png) [@system](https://forum.xod.io/u/system)\
**Post date:** [June 18, 2022, 7:20pm UTC](https://forum.xod.io/t/error-on-upload/6108/5 "2022-06-18T19:20:07Z")

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