# KSE 7 Jenkins Jenkins execution throw Unable to delete lib folders. java.lang.NullPointerException

**URL:** <https://forum.katalon.com/t/kse-7-jenkins-jenkins-execution-throw-unable-to-delete-lib-folders-java-lang-nullpointerexception/38651>\
**Category:** Web Testing\
**Tags:** katalon-studio\
**Created:** [January 15, 2020, 6:39am UTC](https://forum.katalon.com/t/kse-7-jenkins-jenkins-execution-throw-unable-to-delete-lib-folders-java-lang-nullpointerexception/38651 "2020-01-15T06:39:27Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![ThanhTo](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/thanhto/32/697_2.png) [@ThanhTo](https://forum.katalon.com/u/ThanhTo)\
**Post date:** [January 15, 2020, 7:46am UTC](https://forum.katalon.com/t/kse-7-jenkins-jenkins-execution-throw-unable-to-delete-lib-folders-java-lang-nullpointerexception/38651/2 "2020-01-15T07:46:18Z")

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Hi @gxu

Please check the permissions of installation folder.

> [@Integration with jenkins & git](http://forum.katalon.com/t/integration-with-jenkins-git/19548/3):
>
> thanks @Mariusz it’s not about ownership or permission

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