Is there any way to NOT allow the system to invoice if there is zero/negative quantity of an item. This happens when we enter the order and system says zero quantity but we actually have it in stock and we tell the system its ok to continue (in SO entry).

We want to continue the process and ship and then go back and adjust BEFORE invoicing. But what if we forget to adjust, then when it comes time to invoicing, Sage allows invoicing and it will negative the quantity without giving any message.

This way it leave room for human error. We want the system NOT to stop the process at the time of invoicing and not allow invoicing if there is zero or negative quantity on hand. Peachtree does that.