First create solution

Nuvolar.Module.CSharp/ReportV2/Report_Invoice.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Drawing;
+using System.Collections;
+using System.ComponentModel;
+using DevExpress.XtraReports.UI;
+
+namespace Nuvolar.Module.ReportV2
+{
+    public partial class Report_Invoice : DevExpress.XtraReports.UI.XtraReport
+    {
+        public Report_Invoice()
+        {
+            InitializeComponent();
+        }
+    }
+}