Va42 billing plan update

Hi All,

I have to update only - date,description and amount in va42-contract-item's billing plan.

I have two scenarios where fplnr (billing doc number) already exists and fplnr doesn't exist.

I thought of going for BDC but I get some issues there.

In recording, contract item number is not captured.

In recording, item number comes as position of that item. (say if item 20 is in 2nd position recording has 02).

I have posnr in my internal table, but I cant assume that position of item 20 will always be 02.

1. How do I handle this? is there any table that stores this item position?

2. What bapi to use and how to use it for updating date,descriptiona and cost alone? - I have 2 cases - with and W/O fplnr.

Thanks in advance.