Analytic App - Action Tool won't update my Text Input tool

[KateC]

My List Box is set up to select a reporting group, and I've manually listed the four different groups. My Action Tool is set to Update Value (Default), and is connected to a Text Input tool with a column called GroupSelected and a dummy entry in the first data field. I then want to Union the Text Input to my data, which is coming in through a different string of tools, then Filter based on GroupSelected=Group. I've got this set-up from another workflow where this actually works, so I must be missing something. 

I'm running as an Analytic App, selecting a group that I know has data in my input file, and I'm getting no results. 

I've got this set-up from another workflow where this actually works, so I must be missing something.  Sample attached. 

[Bren_Spill]

If you haven't already, try the debugging that @alexnajm mentioned. That will show you where the logic is breaking. 

(Unless @binuacs solution is working for you!)

[KateC]

Closer, @binuacs  - I'm getting output now but not the correct output. I'm selecting for FNMA, the "default" in my text file is GNMA, and so I'm getting a blank file because GNMA has no data in the input file (that's why I'm trying to select FNMA). The Action tool is not updating my text file. 

[apathetichell · Accepted solution]

@KateC - key question. Are you trying to support multiple selections  - or only one? You have this set up for a list box. A list box supports multiple selections.  If you want a single selection - use a dropdown. Here is the mutli-select version. Swap your list box for a dropdown if you want to limit this to a single selection.

[KateC]

Thanks @apathetichell - I took your advice and swapped by list box for a dropdown and now it works. Thanks everybody for all the suggestions!