Vb.net HALCON错误8721:条形码型号列表为空

我的简单项目中有一个错误。我使用vb.net 2008，错误全文如下：

[HALCON error #8721: List of bar code models is empty at HALCONXLib.HBarCodeXClass.FindBarCode(HImageX Image, Object CodeType, Object& DecodedDataStrings)]

我的代码是：

Option Strict Off
Option Explicit On
Imports HalconDotNet
Imports Microsoft
Imports System.Text
Imports System.IO
Imports System.Media
Imports System
Imports Microsoft.VisualBasic
Imports HALCONXLib

Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim htu As HTupleX = New HTupleX
    Dim reader As HBarCodeX = New HBarCodeX()
    Dim Image As HImageX = New HImageX
    Call Image.ReadImage("d:\barcode\image1.JPG")
    Dim regions As HRegionX = New HRegionX
    Try
        regions = reader.FindBarCode(Image, "EAN-13", htu)
    Catch ex As Exception
        RichTextBox1.Text = ex.ToString
    End Try
End Sub
End Class

我想是打电话给

void HBarCodeX.CreateBarCodeModel(
[in] VARIANT GenParamNames, [in] VARIANT GenParamValues)

缺少实际创建读卡器的