Sage could never recreate. Since upgrading to 2015 from 2013, the frequency of occurrence has dropped drastically, but still happens at least once a month, but usually on just one item. Client has hanging Committed qtys also, but it's never the same item as the missing tier field item. I have found that the record with the missing tier normally has the original received qty as the qty on hand, then there is another tier that usually has the correct qoh or would be correct if one last usage was subtracted from it. That would lead you to believe the tiers are created when the item is originally received, but I've never actually caught it at that point - it needs to have more activity than that. So if some MD that has a lot of time on their hands could just look through every single program in every single module that writes to the ItemCost file, I'm sure we could find the culprit. Ha.