# Executing selenium codebase jar using katalon

**URL:** <https://forum.katalon.com/t/executing-selenium-codebase-jar-using-katalon/15224>\
**Category:** Integrations\
**Tags:** integrations, katalon-studio\
**Created:** [December 10, 2018, 2:42pm UTC](https://forum.katalon.com/t/executing-selenium-codebase-jar-using-katalon/15224 "2018-12-10T14:42:53Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![awadhesh](https://avatars.discourse-cdn.com/v4/letter/a/ebca7d/32.png) [@awadhesh](https://forum.katalon.com/u/awadhesh)\
**Post date:** [December 10, 2018, 2:42pm UTC](https://forum.katalon.com/t/executing-selenium-codebase-jar-using-katalon/15224/1 "2018-12-10T14:42:53Z")

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How to execute standalone selenium jar file using katalon studio ?  
Tried, adding external library , used the Loader class and its main method to run , errors are displayed  
as Test Cases/New Test Case FAILED because (of) (Stack trace: groovy.lang.MissingMethodException: No signature of method: Script1544443575458.Loader() is applicable for argument types: () values:   
Possible solutions: notify(), wait(), collect(), every(), find(), grep()

Please help!!

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**Author:** ![devalex88](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/devalex88/32/336_2.png) [@devalex88](https://forum.katalon.com/u/devalex88)\
**Post date:** [December 10, 2018, 11:26pm UTC](https://forum.katalon.com/t/executing-selenium-codebase-jar-using-katalon/15224/2 "2018-12-10T23:26:38Z")

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Could you please show us the script?

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<div class="post-metadata">

**Author:** ![awadhesh](https://avatars.discourse-cdn.com/v4/letter/a/ebca7d/32.png) [@awadhesh](https://forum.katalon.com/u/awadhesh)\
**Post date:** [December 11, 2018, 6:47am UTC](https://forum.katalon.com/t/executing-selenium-codebase-jar-using-katalon/15224/3 "2018-12-11T06:47:49Z")

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## This is the main class in jar which run the test case.

## public class loader { public static void main(String[] args) { loginclass login = new loginclass(); login.LoginApplication(); }}

## i have added the entire jar as external lib and trying to run it as

loader loader = new loader()  
loader.main(null)

Please let me know if it is possible to run my selenium test cases using katalon external library option by calling the main method or invoking entire runnable jar ?

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**Author:** ![Timo\_Kuisma](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@Timo\_Kuisma](https://forum.katalon.com/u/Timo_Kuisma)\
**Post date:** [December 11, 2018, 9:32pm UTC](https://forum.katalon.com/t/executing-selenium-codebase-jar-using-katalon/15224/4 "2018-12-11T21:32:19Z")

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hi,  
ad your custom .jar to the project Driver folder, restart Katalon and should be usable then  
are you imported the package.class in your script editor?  
import my.custom.keyword  
I am using external .jar(s) and works fine