S4H - Badi FCO_COEP_QUANTITY doesn’t work with CWM Material.

Hello Experts,

• We have S4H and we are using Account based COPA.
• In CWM (Catch Weight) scenario, the user change the Net Weight in the invoice (different to Equivalence measure in material master), because is the real weight that customer receive.
• We want register Invoice's Net Weight in the field “Add. Quantity 1” of COPA.
• We had implemented Badi FCO_COEP_QUANTITY, however when badi is called, Invoice does’t exist yet, then Net Weight can´t be read.

Do you know other BADI or some way to update the field “Add. Quantity 1” after the document was posting in COPA?

Thanks in advance for your help.

José Luis