Cause
The bus is missing at the bus port <x> that is assigned to the bus system <y>.
Solution
- Locate bus port in the schematic using the Go to (graphic) functionality that is provided by the popup menu of the Message management dialog.
- Open the of the bus port.
- Bring the Bus data tab to the front.
- Enter the missing bus ID in the Physical network: Bus ID / item number field.
- Or activate the property Ignore missing bus ID, if the bus port does not require a bus ID.
- Then start a new check run.