Cause

A potential definition point was placed on a connection and given a potential name and a signal name. The potential is not defined anywhere in the schematic.

Solution

Possibility 1

Enter the name of an existing potential definition for the potential definition point.

Possibility 2

Define new potential in the schematic, using, for example, a potential connection. Give this connection the name of the potential definition point for which you defined the signal name.

 

Refresh the connections and then start a new check run.