I am getting this error despite having the item in stock and availabe=le.
The upgrades is a non-stock item, the Install is a service item. The FGSO item is a stock item which shows as available, but we can’t include it on a shipment. The shipping rule is Ship Complete.
The FGSO item is the one blocking it but not sure why as the item is available and we are trying to create the shipment for today.