3544068 - Error "Error setting delivery date: Purchase requisition is being processed" with API_SALES_ORDER_SRV when Setting the Request Delivery Date

When updating a sales order using the OData API_SALES_ORDER_SRV (Sales Order A2X) to set the "request delivery date", a lock error occurs: "Error setting delivery date: Purchase requisition is being processed".

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SAP S/4HANA Cloud Public Edition

1. Create a sales order using the API_SALES_ORDER_SRV. The system automatically creates a purchase requisition.
2. When updating the sales order to set the "request delivery date", a lock error occurs: "Error setting delivery date: Purchase requisition is being processed".

The error message is expected. After creating the sales order in the system, a Purchase Requisition is created automatically. This happens asynchronously and if the customer tries to update the "request delivery date", the system also needs to update the Purchase Requisition which is still in creation mode during that time. 

There are 3 solutions for this:

1. Use the OData V4 API_SalesOrder (Sales Order A2X) that already supports schedule lines in create deep. 
2. Increase the sleep time between the API calls.
3. Use the BADI Modification of Requested Delivery Date for Sales Document Items (SD_SLS_MODIFY_ITEM_REQDATE) to change the "request delivery date" on Item Level. 
   • Create a custom field: Create a custom field on sales order item level called “MyItemReqDelDate” of type date and enable usage for the sales order API. 
     
     
     Save and publish the custom field. 
   • Create custom logic for modification of "request delivery date" for sales document items (SD_SLS_MODIFY_ITEM_REQDATE) via the "Custom Logic" app.
   • Create a sales order via the API.
   • Check the sales order in the "Manage Sales Order – Version 2" app. 

API_SALES_ORDER_SRV, A2X, Purchase requisition, PR, Error,  "Error setting delivery date: Purchase requisition is being processed", Request delivery date, OData V4 API, SD_SLS_MODIFY_ITEM_REQDATE, BADI, Sales order, Items, Delay, Sleep time , KBA , SD-SLS-API-2CL , API (Public Cloud) , Problem