We have QB Enterprise 2020 and received the same UOM error message after trying to import our items back to QB. I have 12,000 items that I need price adjustments. 

The Add/Edit Multiple List entries does not work with that many items. The sorting on QB doesn't match with the Excel sorting method. 

The IIF files don't work either. Most of our items are assemblies and we spent a ton of hours trying fit our new prices to the IIF Files. Only to receive error messages at the end of several attempts.

Please help. Our customers already received the new price list months ago. We need them updated on QB ASAP.