Validation of vendor material number in IDOC_INPUT_INVOIC_MRM

Hi folks,

Scenario: Inbound EDI vendor invoices received as IDOCs.

I'm using Logistics Invoice Verification process code INVL to receive and post vendor invoices on to the ERP2004 release of R/3.

I have purchasing info records setup with the vendor material number.

When I process an inbound vendor invoice, I can put in a customer material number i.e. a material number existing in material master in E1EDP19-IDTNR with qualifier E1EDP19-QUALF = 001. When I do this, R/3 checks that the material number is valid and refuses to post an invoice if the material number is invalid - this is good.

This means that the EDI program parameters with the 'Check Material Number' enabled is working as expected.

Now when I only have a vendor material number i.e. E1EDP19-QUALF = 002 an E1EDP19-IDTNR = vendor part number, R/3 posts the invoice even if the vendor part number is invalid - IDOC_INPUT_INVOIC_MRM does not seem to be validating the vendor part number. The document posts whether I use a valid vendor part number or an invalid one - what am I missing?

Satish