Add Serialnumbers to Sales Orders technical Objects

Hi there!

I am searching for a chance, to add from an IDoc input exit serial numbers to a sales order.

The BAPI for the update of sales orders seemes not to be able to do this.

Functions as they are provided in the function group IE01 for equipments are not available.

I found function modules in function group IPW1, but the problem there is, that there is a function to create object headers. So to add to a header needs the header to exist and my BAPI processing does not allow to commit within the exit. Other functions there are provided and called dynamically. I have no idea where.

So: Does anyone know, how a list of serial numbers can be added in one step to a sales order item with existing functionality and without commit in beetween??

Thanks for any hints.