Cause

The value "Property Fluid power (undefined)" was selected at the main function of the fluid device for the Trade property.

Solution

1. Locate the fluid device in the schematic using the Go to (graphic) function from the popup menu in the Message management dialog.
2. Assign a defined trade to the main function.
3. Use the right media code in accordance with DIN ISO 1219-2 for the respective trade at the device tag of the main function.
4. Then start a new check run.