SAP Message SAPLWOSK010 - In IAC Customizing maintain pur. doc. item categories for direct delivery

Diagnosis
The Customizing basic data for order entry in the SAP Retail Store isnot properly maintained. You selected direct delivery (vendor-to-customer). Please enter the purchasing document item categoriesrequired.

System Response
INCLUDE ISR_STOP

Procedure
INCLUDE ISR_CUSTOMIZING