How can I display custom message when QA checklist process fails?

I have defined a custom process for use in the QA checklist for Project Contracts.  The code is executing and does give us the error that we are expecting.  However, I cannot seem to get a custom message displayed.  I'm following note 261036.1 but there isn't an example of a custom message.

My package uses OKC_API.set_message and the call is:

OKC_API.set_message(

        p_app_name     => G_APP_NAME,

        p_msg_name     => 'XX_OKE_ONLY_ONE_CADMIN');

The message that shows up on the Quality Assurance Results check reads:

XX_OKE_ONLY_ONE_CADMIN in the Text.