3017709 - Possible Duplicate exception is not appearing in an invoice

The Possible Duplication exception/error is not appearing, although all the criteria have been met.

SAP Business ByDesign

Default criteria: Same Supplier ID, External document ID matched 80% or above and Invoice date + or - 7 days.

Additional criteria:  The configuration set in the Business Configuration activity "Supplier invoice exception" is causing the issue.

In general:

System will check and need all Default criteria to match between both invoices to raise exception.

When all or one of the elements in default criteria does not match then only system will check for additional criteria, other wise it will not check for them.

System will check and need all additional criteria to match between both invoices to raise exception.

Also, system will check for one more criteria that is Purchase Order reference, only when additional criteria is set up and used by system. If both POs are same then error is raised.

One of the default criteria is:

or  one of additional criteria is not matched.

or PO reference is not there in one of the invoice.

or PO reference is not matched.

Thus no error is appearing.

3194471 - Possible Duplicate of Supplier Invoice is not detected

3238150 - System Failed to Show the Duplicate Exception When External Document ID Contains Apostrophe.

Possible Duplicate error, no exception, supplier invoice duplicate , KBA , exception , SRD-SRM-SI , Supplier Invoicing , Problem