Error 3140 : While trying to Add a(n) SalesOrder with key value of 28672, QB responded There is an invalid reference to QuickBooks Customer "Mark Plummer" in the SalesOrder. QuickBooks error message: The specified name is either invalid or of the wrong type.
QuickBooks customers, vendors, and employees exist in the same database table. When you look at vendors, you're looking at a filtered list of records where the customer type is vendor. Customers can have a type of other. Our system cannot locate customers if their type is other.
In QuickBooks' top menu, click lists > other names list.
When promoted that the change cannot be undone, click OK.
In QB, go to vendor > vendor center.
From the drop down, choose all vendors.
For employees the steps are the same. This error happens when you place test orders using an employee of your company.