3762662 - Credit Memo via api_supplierinvoice_process_srv fails with error "reverse qty greater than qty credited so far"

When doing credit memo through API "API_SUPPLIERINVOICE_PROCESS_SRV" faces error  "Reverse qty greater than qty credited so far".

SAP S/4HANA Cloud Public Edition

1. Create a supplier return scenario (for example, create purchase order, post goods movements, create a return purchase order, and post the return goods movement).
2. Call API API_SUPPLIERINVOICE_PROCESS_SRV to post a supplier credit memo for the return.
3. Submit the request and observe the error: "Reverse qty greater than qty credited so far".

The API payload for creating the supplier credit memo did not include the required header indicator "SupplierInvoiceIsCreditMemo": "s", therefore the document was not treated as a credit memo and the quantity validation failed.

In the API_SUPPLIERINVOICE_PROCESS_SRV payload, add the header field SupplierInvoiceIsCreditMemo with value "s" (for example, "SupplierInvoiceIsCreditMemo": "s").

Resend the request to create the supplier credit memo using the corrected payload.

Verify the credit memo is created successfully without the "Reverse qty greater than qty credited so far" error.

• refer to: API_SUPPLIERINVOICE_PROCESS_SRV - Create Supplier Invoice (Business Accelerator Hub)
• refer to: Header Data fields for Supplier Invoices (Help Portal)

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