@SeanAdams With analytic apps, you don't get output unless you go to the Interface Designer (View menu) and select the tools whose output you want displayed.
Check the box "On Success - Show Results to User" and then choose the tools you want shown. (When you select a tool, its assigned number shows up at the top of its Configuration window.)
I'm not sure about your other question.
Here's my solution. Like some others, I made the drop down dynamic based on the list provided rather than hard coding it.
I also populate the drop down directly in the flow rather than creating an external file as some did.
My solution would have been simpler if I had used the OR option in the filter instead of transposing, but I needed to transpose anyway to get the drop down populated.
Note - had to change the file type from yxwz to yxmd to post.
Finished. Took me a while longer and went a little "off-piste" so got a bit more complex that the solution but I had great fun and learned at bit more. The reason was I wanted to do two things:
The bit that took a bit was getting a list of values for the drop-down. I must be missing something as seems odd that you can just have it populated from a list of values.