Customer Order invoice - cancel CO delivery

Hi all,

In the customer order process, after customer order line partially delivery for a line with non-inventory sales part, I’m creating a customer invoice and this invoice is then posted/authorized.

If my customer rejects my delivery (for example because he disacreases the quantity), I’m able to create a customer credit invoice.

However, I’m not able to cancel the delivery : IFS raises an error message due to the connection of the delivery to an existing invoice. As a consequence, I cannot create a new delivery with the corrected quantity and then create a new invoice with this delivered quantity.

Is there a setup in the application to allow a delivery cancellation if the invoice has been credited? 

Thanks in advance for your help.

Requirement - Example:

On a customer order, I have a line with a number of engineer hours : 100h.

I deliver and invoice 30h.

The customer rejects the invoice, he agrees only on 25h.

I need to create the credit invoice and cancel the delivery for the 30h.

Then I have to deliver 25 instead and invoice this 25.

Then, maybe one month later, I will deliver 5 and invoice this 5.

Regards,

Gladys.