Hi,
In the past has the Average Cost Calc. type always been by Item&Location&Variant? Or has it also been by Item. You can find out this information from the Accounting Periods.
When this is the case, and you run Inventory Valuation report by Location you might run into a situation where quantity is zero but a value is left (not in total but against certain locations). This even counts when at present the Average Cost Calc. type is by Location.
None of the hotfixes will address this situation. Additionally as detailed any new hotfixes will likely only 'correct' a data issue on new transactions. You might also need to 'reopen' adjust cost to have the batch job re-visit pending adjustment but this time with the new hotfix merged. How this is done depends on various factors, but further details are described in the Inventory Costing Error Detection Whitepaper.
mbs.microsoft.com/.../NAVCostingErrorDetectionWP
Could you detail the ID of the hotfix you referenced?
Best regards, Christiaan.