Why the built in keyword doesn’t return false boolean value as per the Katalon documentation, instead the script fails.
WebUI.verifyElementAttributeValue
WebUI.verifyElementHasAttribute
11-08-2018 10:32:21 PM - [INFO] - Finding web element with id: 'Object Repository/disabled_dropdown' located by 'By.xpath: //*[@id = 'PWCMasterPage_PWCWebPartManager_gwpBookingDeatilsLinksFr1_BookingDeatilsLinksFr1_ConsolidatedEventsLs1_drpStatus']' in '5' second(s)11-08-2018 10:32:21 PM - [INFO] - Found 1 web elements with id: 'Object Repository/disabled_dropdown' located by 'By.xpath: //*[@id = 'PWCMasterPage_PWCWebPartManager_gwpBookingDeatilsLinksFr1_BookingDeatilsLinksFr1_ConsolidatedEventsLs1_drpStatus']' in '5' second(s)11-08-2018 10:32:21 PM - [FAILED] - Object 'Object Repository/disabled_dropdown' does not have attribute 'disabled_X'11-08-2018 10:32:21 PM - [FAILED] - Unable to verify if object 'Object Repository/disabled_dropdown' has attribute 'disabled_X' (Root cause: Object 'Object Repository/disabled_dropdown' does not have attribute 'disabled_X')11-08-2018 10:32:21 PM - [END] - End action : Statement - err.println(com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords.verifyElementHasAttribute(com.kms.katalon.core.testobject.ObjectRepository.findTestObject(disabled_dropdown), "disabled_X", 5))11-08-2018 10:32:21 PM - [FAILED] - Test Cases/Working Folder/Verify/Verify_Disabled_TextBox FAILED because (of) (Stack trace: com.kms.katalon.core.exception.StepFailedException: Unable to verify if object 'Object Repository/disabled_dropdown' has attribute 'disabled_X' (Root cause: Object 'Object Repository/disabled_dropdown' does not have attribute 'disabled_X') at com.kms.katalon.core.keyword.internal.KeywordMain.stepFailed(KeywordMain.groovy:36)