DeliveryNote - No item cost was found [Delivery - Rows - Warehouse Code...

Hi there

I am trying to create a Delivery Note through the DI API, with a SalesOrder as the base document. I am getting the above error ("DeliveryNote - No item cost was found [Delivery - Rows - Warehouse Code][line=0]... ")

I am setting the CardCode, BaseEntry, BaseLine, and BaseType (and one user defined field...)....

Anyone know what this means? Is it just something not set up correctly in the SAP company DB?