Variable error, cant see the reason why

i have basic input box with output variable, all strings. then message box…

i am getting errors for the variables (please see attached screenshot). i cant figure out why… any clues?

can you share your xaml file for better understanding @mthomas1


Does changing the lastName variable type (from String to GenericValue) helped, @mthomas1?
(That solved mine some time ago, but I also would like an explanation to this.)