# Cannot open Katalon after latest update

**URL:** <https://forum.katalon.com/t/cannot-open-katalon-after-latest-update/24490>\
**Category:** Web Testing\
**Tags:** katalon-studio\
**Created:** [May 4, 2019, 1:34pm UTC](https://forum.katalon.com/t/cannot-open-katalon-after-latest-update/24490 "2019-05-04T13:34:17Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Brandon\_Hein](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/brandon_hein/32/1092_2.png) [@Brandon\_Hein](https://forum.katalon.com/u/Brandon_Hein)\
**Post date:** [May 5, 2019, 2:46am UTC](https://forum.katalon.com/t/cannot-open-katalon-after-latest-update/24490/2 "2019-05-05T02:46:55Z")

</div>

Just a guess, but I think this is the relevant part of the error log:

Caused by: org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element ‘/C%%Users%lucas.zimmerman%Katalon Studio%Sanofi 1560%Sanofi 1560.prj/bin/lib/CustomKeywords.class’ not found.

Use your file explorer to make sure that this file exists at the mentioned location.

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