# LookupError: no codec search functions registered

**URL:** <https://forum.inductiveautomation.com/t/lookuperror-no-codec-search-functions-registered/9606>\
**Category:** Ignition\
**Created:** [January 27, 2015, 2:56pm UTC](https://forum.inductiveautomation.com/t/lookuperror-no-codec-search-functions-registered/9606 "2015-01-27T14:56:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JordanCClark](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jordancclark/32/83362_2.png) [@JordanCClark](https://forum.inductiveautomation.com/u/JordanCClark)\
**Post date:** [January 27, 2015, 2:56pm UTC](https://forum.inductiveautomation.com/t/lookuperror-no-codec-search-functions-registered/9606/1 "2015-01-27T14:56:31Z")

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After doing an upgrdae (7.7.1 -\> 7.7.2, but I think this can apply for all), I got one client that wouldn’t recover, giving a LookupError: no codec search functions registered: can’t find encoding ‘utf-8’ notification.

Somehow, the client’s Jython implementation got hosed. deleteing the [user]/.ignition folder took care of it, but the actual message threw me for a bit. 😆

In the end, no big deal, but passing it along to help others.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [January 28, 2015, 2:57pm UTC](https://forum.inductiveautomation.com/t/lookuperror-no-codec-search-functions-registered/9606/2 "2015-01-28T14:57:59Z")

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![:thumb_left:](https://us1.discourse-cdn.com/inductiveautomation/original/1X/e26afb081ddde6df016df6ee49159cf56aaca688.gif ":thumb\_left:")