Thanks for your reply. To workaround the limit I should define an inventory for every purchase order.
But I have the fear that the web gui crash with hundred of inventory under a single product.
Could I periodically remove empty inventory accessing the DB and deleting record from table wp_atum_inventory and wp_atum_inventory_meta?
I know that in this way I loss the lot/BBE/inventory data but I risk some other side-effect?
TIA