Issue:
Importing invoices into QuickBooks, I get the error: "The name of the list elements is already in use".
Cause:
This happens when you already have an item mentioned in the list in QuickBooks
Resolution:
QuickBooks create the name automatically at the time of import, however, if the name already exists in another list in QuickBooks then QuickBooks will not permit to create that name and the import will fail. This is a restriction of QuickBooks as it will not permit an identical name in appearing in two lists i.e., you cannot have a Customer and a Vendor with the same name.