Using Planned order Change BAPI with out changing date

Hi

I have a planned order with start date in future.

With in a program, I want to call the planned order using the FM BAPI_PLANNEDORDER_CHANGE to re-explode the order BOM.

I find that only if I change the order start date to system/current date, the planned order BOM gets updated/re-exploded. Else there is no change in the order BOM.

My requirement is to re-explode the BOM with out changing the order dates. In the function module I am maintaining "X' against BOM_EXP_FIX_IND.

But when I do it manually using MD12 and explode BOM with out changing the future start date, the order BOM gets updated.

Please help on this. Or is there any other FM/BAPI for this purpose.