In source of BAPI_INCOMINGINVOICE_CREATE there is no mapping/assignment of headerdata-REPCOUNTRY.
You can try to make enhancement inside BAPI_INCOMINGINVOICE_CREATE an add fieldmapping for headerdata-REPCOUNTRY.
In source of BAPI_INCOMINGINVOICE_CREATE there is no mapping/assignment of headerdata-REPCOUNTRY.
You can try to make enhancement inside BAPI_INCOMINGINVOICE_CREATE an add fieldmapping for headerdata-REPCOUNTRY.