How to use BAPI_SHIPMENT_CHANGE ?

Hi everyone.

I want to use BAPI_SHIPMENT_CHANGE for change ‘Contents’.

You can see that info. on screen capture by following step.

: VT03N -> Button – Means of transport and Packaging Matl for Currnet Shipment (Shift+F9) -> Double click ‘Handling Unit’.

As you can see above, TRUCKID1 was packed with DO 10, 20, 30.

When I change the ‘Contents’ with BAPI_SHIPMENT_CHANGE,

the changing is successful but TRUCKID1 is unpacked. (it’s my Problem)

So I’d like to know how to change ‘Contents’ with keeping pack status.

Current parameter for the bapi is like below.

HEADERDATA

– SHIPMENT_N : shipment no.

HDUNHEADER

– HDL_UNIT_EXID : TRUCKID1

– CONTENT          : TEST1,2,3

HDUNHEADERACTION

– HDL_UNIT_EXID : C

– CONTENT          : C