BAPI_PO_CHANGE

Dear all.

I am using BAPI_PO_CHANGE to change the quantity of a specific po_position.

For example:

pos mat quantity

10 XXX 100

This is what the user sees in the webfrontend. After the user changes the amount to 110 and presses save, the BAPI tables get filled and the function module is called. When i check the purchase order afterwards I have a new quantity of 210 instead of 110.

I checked the tables and 110 is the value I transfer.

Thanks for any help.

Cheers

Sascha