ERS for automatic PO generated via GR

Hi all,

I am trying to do ERS for a PO which is generated automatically at the time of GR. But I am not able to do it, when i m doing ERS via MRRL, it is showing no documents found. But similarly for the same material and vendor when I manually create a PO followed by GR, I am able to do ERS.

On analysis, I found that during the automatic generation of PO at the time of GR, the EKRS table is not getting updated but at the time of manual creation of PO, the table EKRS is getting updated.

I have checked the checkboxes of the vendor master and the NO ERS checkbox is not flagged in the info record , in PO, ERS checkbox is flagged both the time. Kindly help