Cause

The connection point description is missing at a PLC connection point.

PLC connection points with the "PLC connection point, internal, general" function definition are not checked before this check run since they are only used for the display of free symbolic addresses.

Solution

1. In the Properties <...> dialog of the PLC connection point, enter the missing connection point description in the field by the same name.
2. If required, start a new check run.