Prevent Cancelled Invoice from being picked up in the batch job

Hi Team,

Below is the requirement.

When an invoice is cancelled, SAP is supposed to automatically block the sales order to prevent it from being picked up in the overnight batch job and generating another invoice. It is not working and we(client) are having to manually go in after cancelling to put the "Inv Cancel AutoBlock" on the sales order.

How can we achieve this?

Thanks

PB