Update - had to use the providex.dde trick where you open up the fields for VI imports - typically that IM_Item_Warehouse import only allows reorder point info, so you have to get the rest of the fields to show up (QtyonHand, QtyonPO, etc.). But everything seemed to work ok - reinitialized IM_ItemWarehouse, cleaned up the file from 16K records to 9.5K, ran the import, tested some items and they look ok. We'll know tomorrow morning if I'll need to restore from backup:)