We can’t find an Assignment element named 'Set the Error Message Output'. Make sure the API Name is 'Set_the_Error_Message_Output'.

Hi Eduardo, the checker matches on element type and API name exactly, so it's usually a small mismatch. Things to check: 

1) The element must be an Assignment, not a Decision or Update Records element. 

2) Open the element and confirm the API Name is exactly Set_the_Error_Message_Output. If you renamed the label after creating it, the API Name doesn't update automatically, and extra spaces or a missing underscore will fail the check. 

3) Make sure you're editing the flow the challenge names, then Save and Activate. The checker reads the active version, so a newer unsaved or inactive version won't count. 

4) Confirm the element is connected in the path the instructions describe (for example, on the fault connector), not left floating on the canvas. 

Then check the challenge again against the same org. Hope this helps!