Cause

A net definition point was placed on a connection and equipped with a signal name. However, the signal is not defined at any place of the schematic.

Solution

Possibility 1

Enter the name of an existing signal at the net definition point.

Possibility 2

1. In the schematic define a new signal, for example by means of a potential definition point or a potential connection point.
2. Assign the potential name to this connection point and the signal name of the net definition point.

---

If required, start a new check run.