Delete Variables in Captivate 8

Hello,

    I have read a previous post on variable deletion within a Captivate project but it did not solve my problem. I tried deleting the associated Advanced Actions/Shared Actions and then deleting the variables, but I am having no luck. When I try to delete the variable, I get a dialog box saying "Deleting variables used by Advanced Action, Shared Action, text objects is not allowed". However, when I look at the "Usage", in the dialog box it just says "", which I interpret as Captivate not finding where it's being used.

I have tried NOT deleting the slide with the actions before trying to delete the actions and variables as a previous post suggested, but this still doesn't work. I was glad to see that they added the ability to delete variables, but clearly either I am missing something or there is a bug. Please tell me I'm missing something!

Thanks!