How to send the GRN to SUS system

Hi,

We configured SUS system.

MM-SUS : Process - PO > GR against inbound del > Invoice, this is the process

Here, once GR has been done notification (GRN) goes to SUS system, but its not happening

We have configured the note and running the report (rpoddelvry) - after when we check with i-doc (we02)

its showing error in the idoc STPPOD

Could you please help me on this?

Thanks

Harish