Curtis,
That looks like just what I am looking for.
I read through the blog but am still unsure about this:
Using your attachment as reference I can see you take a string variable and check to see what the string is using the "Calculate Value" tool and then set the data type to Boolean
But I am not quite sure what to put in the code block or expression field and string variable a precondition to the "Calculate Value" tool?
Thanks
Eric