Invalid Number : Error : Duplicate Name Exists Error

QuickBooks Online > Intuit App Center - Transaction Pro Importer for QuickBooks Online
If you receive the following error message, Invalid Number :  Error : Duplicate Name Exists Error, this is because you are trying to add a name that already exists in another list in QuickBooks Online ("QBO").  You cannot use the same name across the multiple name lists:  Customer, Vendor or Employee.

In other words if you are trying to add a customer to QBO that already exists as a vendor or employee QBO will not allow you to save the new customer. 

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