No BP in Auto Created Supplier/Item Relationship

With the Item Master Purchase Price Level at 2 - Supplier/Item/Branch, we're loading supplier catalog records in P41061.  The P41061 load is automatically creating Supplier/Item Relationship records in F43090.  However, these records have no branch plant assigned.  When we try to load the receipt routing code, we get a hard error because the receipt routing setup is by branch.  I see no processing options in P41061 that affect branch assignment in the resulting Supplier/Item Relationship record.  Is there any way to get the same branch as the supplier catalog record assigned?