LSMW (complex line)

Hi,

I have to upload file through LSMW (BAPI method).

File has the following structure:

HEADER1 ITEM1 ITEM2 ITEM3

HEADER2 ITEM1 ITEM2 ITEM3

HEADER3 ITEM1 ITEM2 ITEM3

and so on

So, number of items is constatnt for every header object.

I should get the next hierarchy of created object:

HEADER

- ITEM1

- ITEM2

- ITEM3

But now I can only get

HEADER

- ITEM1

Is it possible to do this task via LSMW?