3720838 - Error "You can read pricing elements only for a single sales document item at once" when using the OData V4 API to query multiple customer returns

When using the OData V4 API to query multiple customer returns while expanding pricing-related entities, the API returns an error message as "You can read pricing elements only for a single sales document item at once." 

Example payload: https://host:port/sap/opu/odata4/sap/api_customerreturn/srvd_a2x/sap/customerreturn/0001/CustomerReturn?$filter=(CustomerReturn eq '123456' or CustomerReturn eq '123457')&$expand=_Item($expand=_ItemPricingElement,_ItemText,_ItemPartner),_Partner,_PricingElement

This is a limitation in OData V4 API, currently only one customer return order can be retrieved via OData V4 when expanding pricing related entities.

Follow either of the workaround below:

• Use the OData V2 API to query multiple customer returns; note that this API supports expansion only at the first level.
• Use OData V4 Batch request which supports querying multiple customer returns.

• Refer to: Customer Return (A2X) | Batch requests(OData V4 API)
• Refer to: Customer Return (A2X) | OData V2 API

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