PO with reference to invoice without GR (WRX)

Question

I would like to create POs with reference to an internal order and ONLY creating an invoice with reference to the invoice.
I configured two-matching in SPRO, that is Maintain Account Assignment Category with only invoice receipt.
I can create an invoice, it is not expected to create a MIGO, nevertheless when I want to post the invoice it is missing the GR/IR account determinarion (WRX).
I must be missing something, however I do not want to post it to a GR/IR account as only invoices are expected to be posted against the PO.
Please advice,
Daan

Answer 1

You need in Customizing the WRX settings because this WRX is not only
for PO without GR flag but for the PO with GR flag too while
the automatic posting
In IMG it is impossible to control apart the settings of
account determination for
PO without GR flag OR
PO with GR flag .
Of course this could be an issue of FI and this relates to the chart
of accounts too. You can find more information in IMG documentation
of "automatic postic". Please see the note 301477 too.
RESOLVED, even though all answers are useful the solution is within maintaining the WRX settings for this to happen.
As of Release 4.0, you can enter a valuation class for the material group (Transaction OMQW). By means of this valuation class, the G/L account is determined in the purchase order which is relevant for transaction/event KBS provided that no material master record exists for the material ordered. The determination of the GR/IR clearing account is always carried out with an EMPT VALAUATION CLASS.