Doc flow linkage when adding a new line in a Billing order

Question

Hi,
I am trying to add a new line in an existing billing order using CRM_ORDER_MAINTAIN function module.
This billing order was initially created from a preceding document and hence the pricing conditions flowed from that document to the line item created at that time.
In the doc flow for the line item did have reference to the previous document.
Now I need to create a new line item in the billing order. I am able to establish a linkage with the previous document for the new line item. The pricing conditions do get copied. But the problem is the linkage with the previous document does not appear in the document flow for the new item.
following is my code for the document flow for the new line item
Input fields
doc flow
ls_input_field-ref_kind = 'B'.
ls_input_field-ref_handle = '0000000001'.
ls_input_field-objectname = 'DOC_FLOW'.
ls_input_name-fieldname = 'QUANTITY'.
insert ls_input_name into table ls_input_field-field_names.
ls_input_name-fieldname = 'QUANTITY_UNIT'.
insert ls_input_name into table ls_input_field-field_names.
insert ls_input_field into table p_input_fields.
data
wa_doc_flow_extd-objkey_a = previous document line item guid
wa_doc_flow_extd-vona_kind = 'A'.
wa_doc_flow_extd-brel_kind = 'B'.
wa_doc_flow_extd-brel_mode = 'A'.
wa_doc_flow_extd-quantity = p_prevdoc-quantity.
wa_doc_flow_extd-quantity_unit = p_prevdoc-quantity_unit.
wa_doc_flow_extd-reltype = 'VONA'.
wa_doc_flow_extd-relation_handle = '0000000002'.
wa_doc_flow_extd-objtype_b = 'BUS2000131'.
wa_doc_flow_extd-objtype_a = 'BUS2000131'.
append wa_doc_flow_extd to wa_doc_flow-doc_link .
wa_doc_flow-ref_handle = '0000000001'.
wa_doc_flow-ref_kind = 'B'.
insert wa_doc_flow into table p_doc_flow.
Thanks,
Chamu

Answer 1

Hi,
I was able to solve it.
The relationid field in the document flow table had to be filled.
I used the same relationid which was created for the previous item and it then worked.
Regards,
Chamu