Create an item in inventory with a UPC of 111111111111 (there’s 12 1’s there). RPRO will add a 0 to the front to make it 13 digits. Now start a PI and add a manual count entering 111111111111. It will recognize this UPC and add the count to that item. Now make an import map that has Quantity from 1 to 6 and UPC from 7 to 18. Create a text file with the string 000001111111111111 This should import as a qty of 1 for the item you made with UPC 111111111111 just like the manual entry did. Import this file using your map. It will not import. Add a 0 in front of the UPC in the file and change your map so UPC is from 7 to 19. The file now imports.

SOLUTION
It works if you click on checksum in the import map. If checksum isn’t checked, then the tool calculates the checksum before looking it up for any
UPC with fewer than 13 digits.