How use the contract reference in iDoc ORDERS

Hello experts,

I would like to use the iDoc ORDERS in order to create a sales order in my system, with reference to a contract.

It's working pretty well when I want to copy all the items of the contract and modify quantities. But I can't find out how to create an oder with only one item from the contract (which got more than one item).

I thought I could use the Action code in segment E1EDP01, but the code seems to have no consequence.

Then, what I want to do is :

1/ Create a contract with 3 items

2/ Create a sales order with reference to this contract but :

- delete two of the items, when they have been normally copied, because of customizing

- keep one item and modify quantity

Do you think this is possible plesae ?

Thank you in advance

Alex