Update shipments using SHPMNT03

Hi All,

I have been looking for some help in the Logistics IDocs area.

The current inbound interface utilizes the following to perform the creation, pick (SDPICK), pack (SDPACK), status update and PGI functions:

IDOC Type: SHPMNT03

Msg Type: SHPMNT

Msg Function: SHP

Function Module: IDOC_INPUT_SHPMNT

In future, shipments will be created by this third party transportation system that the client uses. So we need this interface to do everything else but create, i.e., pick, pack, status update and PGI functions.

Is there a way to use SHPMNT03 Idoc to update shipments instead of creating shipments? If yes, what needs to be done? We do not want to change the Idoc type because its being used by a number of warehouses.

Thanks,

Jay Viswanathan.