3667219 - PATCH operation in the API_PROCESS_ORDER_2_SRV OData service does not update scheduling fields

The PATCH operation in the API_PROCESS_ORDER_2_SRV OData service returns an HTTP 204 (No Content) response, indicating success; however, only the quantity field is updated, while the scheduling fields are ignored.

SAP S/4HANA Cloud Public Edition

1. Execute a PATCH request to the endpoint `/sap/opu/odata/sap/API_PROCESS_ORDER_2_SRV/A_ProcessOrder_2('PO number').
2. Observe the response:
   • HTTP Response: 204 No Content (success)
   • Only the quantity field (`TotalQuantity`) is updated successfully.
   • All scheduling fields remain unchanged without any error message.

The PATCH request includes both scheduling fields and a quantity field, but when using BasicSchedulingType, the API expects these to be updated in separate calls—one for scheduling fields and another for quantity. 

• Ensure that the payload for the PATCH operation includes only the fields relevant to the scheduling update.
• Perform the following steps:
  1. First, execute a PATCH request with the scheduling fields only.
  2. Then, execute a separate PATCH request to update the quantity field.

• Refer to: Update Process Order for details on dependent mandatory properties and example payloads.

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