MIRO before GR

Hi Experts,

I am trying to do MIRO for a PO before the GR. I have created the PO with the GR-Bsd IV off and the same setting is maintained in the vendor.

However, MIRO gives the below error when I try to post it.

"No goods receipt exists: You cannot enter the invoice - Message no. M8312"

Appreciate any thoughts on this.

Thanks in advance,

Em Jay