Cause

You have specified a connection definition point without properties on a connection.

Solution

1. Locate the connection definition point in the schematic by using the Go to (graphic) functionality from the popup menu in the Message management dialog.
2. Call up the Properties <...> dialog of the connection definition point and fill the fields of the properties with values, for example for the connection designation, the cross-section or diameter and / or the color.
3. If required, start a new check run.