Doubt in EDI 850

Hi All,

I have a doubt regarding EDI 850.

Once we receive EDI 850, 850 may contain multiple ST segments, one ST is one PO right.So If in case I receive a 850 with 10ST's, now 10 PO's will get created in SAP ECC, if in case 3 PO's failed in ECC. what is the next step?how sender system knows that 3 PO's got failed and other 7 PO's got processed?

Thanks.