Hi @skotian1289
Here is how you can do it.
Workflow:
1. Configure Input tool to output filename as column.
2. Using formula tool extract date in the filename and check whether its today's date if yes than flag Is Latest 1 else flag Is Latest 0.
3. Using message tool if Is Latest is 0 (not latest) then show error message and stop execution.
Case 1: with the latest file.
Case 2: with the old file.
Hope this helps : )