When opening the Fiori app 'Create Supplier Invoices' or the identical app 'Manage Supplier Invoices' you get the error message:
Method 'ITEMSWITHPURCHAS_GET_ENTITYSET' not implemented in data provider class.
MM_SUPPIV_MANS1, MM_SUPPLIER_INVOICE_MANAGE, Accounts Payable Accountant - Procurement , KBA , MM-FIO-IV , Fiori UI for Invoice Verification , CA-UI5-COR , SAP UI5 Core and Runtime , Problem
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