For pricing error VF073, check in the billing document, pricing has been maintained or not. It looks the pricing condition is set as mandatory in the pricing procedure, but no pricing value has been maintained in the document (also check pricing master record has been maintained in t.code VK11/VK12 or not). If the pricing is there, then you may need to refer OSS 1625158 - Error messages VF073 and V1208.
For VF017 error message, check the document flow of the delivery, whether already the invoice has been created. If not then check whether OSS Note 728514 - Cross Company: Delivery is proposed again is of any help to you.
Regards,