When creating a Purchase Order from the Sales Order (under Actions/Functions/Create Purchase Document/Create Purchase Order) that includes a Drop Shipment and the customer is set as an Alternate Adress, it returns an error similar to this

"Ship-to Code must be equal to '[Ship-to Code]' in Requisition Line: Worksheet Template Name=, Journal Batch Name=100, Line No.=750000. Current value is ''.

This prevents the user from creating the purchase order.

A similar error happens if the item has inventory in a bin.