Unable to see confirmation message via LocationUtil RequestScopedInfoMessage

am New to Guidewire:

Currently not getting warning message on toggling checkbox; is it some restriction or am I missing some setting/property?;

which is prerequisite for this confirmation message before pressing ok or blocking this message.

Please share.

It is Guidewire 8.28.0

LocationUtil.addRequestScopedInfoMessage(displaykey.Web.Policy.DuplicateMsgSent)

If i understand your requirement correctly, On clicking on "OK" button, some logic should be executed to find if the message is duplicate and then a Confirm message popup is expected in Screen. If my understanding is correct then i think you can not achieve this as you expect.

You need to know that, the "Confirm message popup" will trigger immediately as soon as you click the "OK" button and then your code logic to find duplicate is executed.

The code written in enhancement will only throw the info or warning or error like string messages to the UI screen.

As far as i know, In this case you can make use of any points below,

1. See if you can use the "addRequestScopedWarningMessage" which will show as a warning message in UI.
2. Write the duplicate finding logic in the "post on change" property based on the value in UI fields. We can then throw the "addRequestScopedWarningMessage" or "addRequestScopedInfoMessage" in UI before clicking the "OK" button.

I hope its helps you.