unable to load Party Contacts using CSI_I_PARTY_INTERFACE

   1st try.

|PARTY_NUMBER |PARTY_SOURCE_TABLE |PARTY_RELATIONSHIP_TYPE_CODE |CONTACT_FLAG

--------------  -------------------     -----------------------------   -------------

|1503 |HZ_PARTIES |OWNER |N

|1503 |HZ_PARTIES |SOLD_TO |N

|109509 |HZ_PARTIES |LICENSE USER         |Y

|109509 |HZ_PARTIES |SHIP_TO         |Y

|151693 |HZ_PARTIES |SHIP_TO         |Y

|109509 |HZ_PARTIES |BILL_TO         |Y

Fails saying multiple parties cannot be loaded at once.

2nd try
loaded first two rows(1503 party info with contact_flag = 'N') successfully

subsequent try for loading row 3-6 failed(Contact info with contact_flag = 'Y').

So later tried to load 3rd alone which is contact again but failed.

now my Question is, Does the fields to be populated in CSI_I_PARTY_INTERFACE for contacts differ from that of party.