Cause

The conduit length value is not specified at the main function of the conduit.

Solution

1. Locate the main function of the conduit in the schematic from the Message management dialog using the Go to (graphic) functionality.
2. Then double-click the selected cable definition line and call up the Properties <...> dialog for the conduit.
3. If not already set by default, switch to the Conduit / line tab and enter a value in the Length field.
4. Click [OK].
5. If required, start a new check run.