Reg : An element is bound to the data source 'MyModel' which has not been provided any data

Dear Team,

I am binding .Net Data source to my template. But i am getting above subjected error. Please find image link below.

 // Get the customer object with the Id = 15.
        InvoiceModel customer = new InvoiceModel()
        {
            Amount = 100,
            CustomerAddress = "4/46, uppupalayam east",
            CustomerName = "Sakthi",
            InvoiceComment = " Test Comment",
            InvoiceDate = DateTime.Now,
            InvoiceRef = "REF1234",
            PaidAmount = 2000,
            ProductName = "Metformin 500",
            Qty = 1000,
            TaxAmount = 100,
            UnitCost = 2
        };

        IEnumerable<invoicemodel> invoiceModels = new List<invoicemodel>() { customer };

        // Create a temporary file for the generated report document.
        string reportDocumentTemplate = @"C:\Users\User\Documents\DocentricInvoiceTemplate.docx";
        string reportDocumentReport = @"C:\Users\User\Documents\DocentricInvoiceReport.docx";
        using (Stream reportDocumentStream = File.Create(reportDocumentReport))
        {
            // Open the report template file.
            using (Stream reportTemplateStream = new FileStream(reportDocumentTemplate, FileMode.Open))
            {
                // Generate the report document using 'DocumentGenerator'.
                DocumentGenerator dg = new DocumentGenerator(invoiceModels.First());
                DocumentGenerationResult result = dg.GenerateDocument(reportTemplateStream, reportDocumentStream);
                if (result.HasErrors)
                {
                    //foreach (Word.Error error in result.Errors) Console.Out.WriteLine(error.Message);
                }
            }
        }

        return reportDocumentReport;

Regards, Sakthi