Thanks for your response Tammy.
We don't want to spent for redevelopment of this BAPI as it is hitting almost 9 tables ( CAUFV,AFPO,AKPO....) . It is from Production order + Sales order.
I have gone with your blog for SFLIGHT BAPI, where BAPI have individual import parameters.
We have a workaround by creating a RFC enabled FM with to and from for range tables. Inside the FM we make then as range table with fixed sign as "I" and option as "BT" and call in the inherit BAPI.
I am wondering there is no documentation from SAP on this as we have so many ABAP functions which can leveraged.
Regards,
Sandeep