we send PO's to third party through Idoc's. we use program BUS2012_ICH_R3 routine SEND_PORDCR1 to create outbound Idoc's.
we are facing above an issue "Change indicators could not be uniquely determined in material mapping"(Message No. M_ 011), when BOM has more than one component for subcontract PO creation in S4HANA system. if BOM has one component , we are able to create outbound Idoc's.