How to extract a value from a label if the label is repeated

As stated, using find you will only get the first result, so no issues with multiple results. The alternative would be findAll.

To solve the error you just need to make sure the result for categoryCode is a String by getting the text(). Same thing as the line above it.

String categoryCode = new XmlSlurper().parseText(context.response)
 .CategoryOption
 .find {it.PriceInfos.PriceInfo.find { it.'@BreakdownType'.text() == "02 A" }}
 .'@PricedCategoryCode'.text()

context.testCase.setPropertyValue('CategoryList', categoryCode)

Sorry I missed this before.

coopernico46,
See demo script. (use "log.info" instead of println)

https://ideone.com/GIA7pN

See the colored text (changes)

def categoryCode = new XmlSlurper().parseText(context.response).'**'.find{ 
    it.PriceInfos.PriceInfo.find {
        it.'@BreakdownType'.text() == "02 A"
    }
}.@PricedCategoryCode?.text()
context.testCase.setPropertyValue('PricedCategoryCode', categoryCode)