Mark an order item as being packed

The API responds by sending purchase order details in the response:

OrderItemIdIntegerSeller Center Order Item ID
PurchaseOrderIdIntegerOMS Order ID
PurchaseOrderNumberStringOMS Order number
PackageIdStringOMS Package Id


Error codeMessage
20E020: "%s" Invalid Order Item ID
21E021: OMS Api Error Occurred
23E023: "%s" Invalid Order Item IDs
24E024: "%s" Invalid Delivery Type
25E025: "%s" Invalid Shipping Provider
29E029: Order items must be from the same order
73E073: All order items must have status Pending or Ready To Ship. (%s)
91E091: You are not allowed to set the shipment provider and tracking number and the delivery type is wrong. Please use send_to_warehouse
94E094: Serial numbers specified incorrectly
95E095: Invalid serial number format (%s)
96E096: Duplicate serial number among order items (%s)
119E119: Some order items are not yet ready to be processed, please try again later. (%s).