Create LSMW (Using BAPI) only to Modify Product master

Hello Experts,

I am trying to create a LSMW using BAPI (Business Boject: BUS10001) only to modify product master and do not to create a new entry in case product location combination does not exist in SNC. First of all is it possible? .. If yes please suggest me on how to do it.

Example: Update  only Rounding value/Rounding profile. Text file will have 4 fileds (Product Location RoundingValue RoundingProfile).

Method: SAVEMULTIPLE2

Message type: PRDAPS_SAVEMULTIPLE2

I am defining relationship of the structure to below segements:

E1PRDAPS_SAVEMULTIPLE2 (Header Segment)

E1BP10001LOCPRDVERS2 (Product: Version-Dependent Data)

E1BP10001LOCPRDVERS2X (Product: Version-Dependent Data, Change Parameters)

Currently what i created is creating and modifying both. Please guide me ahead how to make it only CHANGE - SPECIFIC. !!! Helpful answers will be rewarded. Waiting for your positive response. :-)

Thanks,

Ankit B