I am developing one invoice inserting C# application for QuickBooks Pro 2013 with QBFC 10 using C#. In that I want to update few custom fields for each invoice with different values, the fields are 'Contract #', 'B-Day' and 'Spouse's Name' these are related to customers. Please check my post in the intuitdeveloper forum for the same with more details.
I am getting error:
There was an error when saving a data extension named "Contract #". QuickBooks error message: The attribute definition for an attribute could not be found. The definition must exist before associated attributes can be created."