I'm on the finishing up side of a project of several hours of inventory work with TI. I didn't run into the popup even though changing the classid was one of the steps.
Were you using the simple or intelligent control file? I also wonder if you just used "InventoryItem" for the level indicator or "InventoryItem,Change"
"InventoryItem,Change",100002693-Pan ,100002693-Pan (185 Gallon Alum. Tank Brown Box-65L x 28W x 24H),QB,,,,,,,,,,,EXEMPT,AC,,,EA,EA,EA,"1,634.64",,,,,,,817.32,,,,,,,,,,,,,,,,,,,,,,,,,,,,,PP,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,R,F,,,,,E
"CompanyDefaults,Change",WHSE1,SHELF1,SHELF1,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,