# ClassNotFoundException on keyword

**URL:** <https://forum.katalon.com/t/classnotfoundexception-on-keyword/38045>\
**Category:** Web Testing\
**Tags:** katalon-studio\
**Created:** [December 30, 2019, 6:07pm UTC](https://forum.katalon.com/t/classnotfoundexception-on-keyword/38045 "2019-12-30T18:07:33Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![egarcia](https://avatars.discourse-cdn.com/v4/letter/e/ac91a4/32.png) [@egarcia](https://forum.katalon.com/u/egarcia)\
**Post date:** [December 30, 2019, 6:07pm UTC](https://forum.katalon.com/t/classnotfoundexception-on-keyword/38045/1 "2019-12-30T18:07:33Z")

</div>

I have a keyword I use to log in to a website. It used to work just fine for months, today it is not working.

This is the error:

SLF4J: The requested version 1.7.16 by your slf4j binding is not compatible with [1.6]  
SLF4J: See [SLF4J Error Codes](http://www.slf4j.org/codes.html#version_mismatch) for further details.  
2019-12-30 11:36:28.135 INFO c.k.katalon.core.main.TestCaseExecutor - --------------------  
2019-12-30 11:36:28.142 INFO c.k.katalon.core.main.TestCaseExecutor - START Test Cases/Scenarios/Make a new Scenario  
2019-12-30 11:36:28.877 INFO c.k.katalon.core.main.TestCaseExecutor - (Default) DL1 = \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
2019-12-30 11:36:29.560 DEBUG testcase.Make a new Scenario - 1: package1.FiveCastLogin.Login()  
2019-12-30 11:36:29.603 ERROR k.k.c.m.CustomKeywordDelegatingMetaClass - ❌ package1.FiveCastLogin  
2019-12-30 11:36:29.608 ERROR c.k.katalon.core.main.TestCaseExecutor - ❌ Test Cases/Scenarios/Make a new Scenario FAILED.  
Reason:  
java.lang.ClassNotFoundException: package1.FiveCastLogin  
at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.getCustomKeywordClassAndSetMetaClass(CustomKeywordDelegatingMetaClass.java:100)  
at com.kms.katalon.core.main.CustomKeywordDelegatingMetaClass.invokeStaticMethod(CustomKeywordDelegatingMetaClass.java:45)  
at Make a new Scenario.run(Make a new Scenario:17)  
at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)  
at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)  
at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:337)  
at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:328)  
at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:307)  
at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:299)  
at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:233)  
at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:114)  
at com.kms.katalon.core.main.TestCaseMain.runTestCase(TestCaseMain.java:105)  
at com.kms.katalon.core.main.TestCaseMain$runTestCase$0.call(Unknown Source)  
at TempTestCase1577727346348.run(TempTestCase1577727346348.groovy:21)

2019-12-30 11:36:29.636 INFO c.k.katalon.core.main.TestCaseExecutor - END Test Cases/Scenarios/Make a new Scenario

i have stripped out all my lines in my test case so now it just looks like this:

import static com.kms.katalon.core.checkpoint.CheckpointFactory.findCheckpoint  
import static com.kms.katalon.core.testcase.TestCaseFactory.findTestCase  
import static com.kms.katalon.core.testdata.TestDataFactory.findTestData  
import static com.kms.katalon.core.testobject.ObjectRepository.findTestObject  
import com.kms.katalon.core.checkpoint.Checkpoint as Checkpoint  
import com.kms.katalon.core.cucumber.keyword.CucumberBuiltinKeywords as CucumberKW  
import com.kms.katalon.core.mobile.keyword.MobileBuiltInKeywords as Mobile  
import com.kms.katalon.core.model.FailureHandling as FailureHandling  
import com.kms.katalon.core.testcase.TestCase as TestCase  
import com.kms.katalon.core.testdata.TestData as TestData  
import com.kms.katalon.core.testobject.TestObject as TestObject  
import com.kms.katalon.core.webservice.keyword.WSBuiltInKeywords as WS  
import com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords as WebUI  
import internal.GlobalVariable as GlobalVariable

‘Login’  
CustomKeywords.‘package1.FiveCastLogin.Login’()