I've been running for quite some time.
I needed to make an adjustment to it, where I added a Text Input tool and a Join.
The text input tool would not output anything. In fact, the Select Tool next in line only showed *Unknown.
I changed it to an Excel file, with the same results.
However, if I copy the input tool with the select and put it in a new workflow, it runs as it should.
It's one column with 13 rows.
***Updated with images***

I have a workflow