Null Pointer Error When Opening Katalon

Web Testing
1

I completed running a script using KRE, the script failed, so I attempted to open Katalon Studio to run the script using Katalon Studio and thus a java.lang.NullPointerException: Cannot invoke method close() on null object error was generated. Once I clicked through the error, I noticed that the IDE Run button was no longer present.

Error:

java.lang.NullPointerException: Cannot invoke method close() on null object
at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:47)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:34)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
at com.kms.katalon.custom.generation.GlobalVariableTemplate.generateGlobalVariableFile(GlobalVariableTemplate.groovy:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1225)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:822)
at com.kms.katalon.custom.generation.GlobalVariableTemplate.invokeMethod(GlobalVariableTemplate.groovy)
at com.kms.katalon.custom.parser.GlobalVariableParser.generateGlobalVariableFile(GlobalVariableParser.java:57)
at com.kms.katalon.custom.parser.GlobalVariableParser.generateGlobalVariableLibFile(GlobalVariableParser.java:45)
at com.kms.katalon.controller.GlobalVariableController.generateGlobalVariableLibFile(GlobalVariableController.java:65)
at com.kms.katalon.controller.ProjectController.openProjectForUI(ProjectController.java:130)
at com.kms.katalon.composer.project.handlers.OpenProjectHandler$1.run(OpenProjectHandler.java:166)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:122)

The error generated by the KRE is

2022-03-23 14:25:42.412 ERROR c.k.k.core.keyword.internal.KeywordMain - ? Unable to click on object ‘Object Repository/CenterbaseWeb/NavBar/HR-Users’ (Root cause: com.kms.katalon.core.exception.StepFailedException: Unable to click on object ‘Object Repository/CenterbaseWeb/NavBar/HR-Users’
at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.stepFailed(WebUIKeywordMain.groovy:64)
at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.runKeyword(WebUIKeywordMain.groovy:26)
at com.kms.katalon.core.webui.keyword.builtin.ClickKeyword.click(ClickKeyword.groovy:74)
at com.kms.katalon.core.webui.keyword.builtin.ClickKeyword.execute(ClickKeyword.groovy:40)
at com.kms.katalon.core.keyword.internal.KeywordExecutor.executeKeywordForPlatform(KeywordExecutor.groovy:74)
at com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords.click(WebUiBuiltInKeywords.groovy:620)
at com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords$click$3.call(Unknown Source)
at SmokeLinks.run(SmokeLinks:210)
at com.kms.katalon.core.main.ScriptEngine.run(ScriptEngine.java:194)
at com.kms.katalon.core.main.ScriptEngine.runScriptAsRawText(ScriptEngine.java:119)
at com.kms.katalon.core.main.TestCaseExecutor.runScript(TestCaseExecutor.java:442)
at com.kms.katalon.core.main.TestCaseExecutor.doExecute(TestCaseExecutor.java:433)
at com.kms.katalon.core.main.TestCaseExecutor.processExecutionPhase(TestCaseExecutor.java:412)
at com.kms.katalon.core.main.TestCaseExecutor.accessMainPhase(TestCaseExecutor.java:404)
at com.kms.katalon.core.main.TestCaseExecutor.execute(TestCaseExecutor.java:281)
at com.kms.katalon.core.main.TestSuiteExecutor.accessTestCaseMainPhase(TestSuiteExecutor.java:202)
at com.kms.katalon.core.main.TestSuiteExecutor.accessTestSuiteMainPhase(TestSuiteExecutor.java:164)
at com.kms.katalon.core.main.TestSuiteExecutor.execute(TestSuiteExecutor.java:105)
at com.kms.katalon.core.main.TestCaseMain.startTestSuite(TestCaseMain.java:185)
at com.kms.katalon.core.main.TestCaseMain$startTestSuite$0.call(Unknown Source)
at TempTestSuite1648063410553.run(TempTestSuite1648063410553.groovy:36)
Caused by: org.openqa.selenium.ElementNotInteractableException: element not interactable
(Session info: chrome=99.0.4844.82)

I am using Katalon Studio 64-8.2.5

2

I was facing same issue. It worked for me after removing Lib and bin folder from the project

3

Hi there,

Thank you very much for your topic. Please note that it may take a little while before a member of our community or from Katalon team responds to you.

Thanks!

4

If you are going to reset your project as per @avadhoot.kharade suggestion, then copy the below and put it into your personal KS wiki:

How to Reset a Project

  1. Close your Katalon project

  2. Delete folders

    /bin

    /Libs

    /.cache

    /.classpath

    /.project

— these folders are safe to delete as they will be recreated.

  1. Reopen your project