I opened the sample company fine. The sample company was set to use single UOM. I tried to import my data and it said I needed a UOM set.
I dont use UOM, because I can't. I can not use UOMs in the Pro edition.
I verified and rebuilt my data as you instructed, with no errors found.
I can not turn on UOM to import my items because it is not available in the Pro edition.
This seems like a bug to me. You should still be able to import Inventory Parts even though you do not (cannot) use the UOM option. It did allow me to import my non-inventory parts fine. But once I specify a COGS, or Income account it pops up the error about the UOM being turned off.
