代码：

void ShowRect(int iWideSize)
         {
             hWindowControl1.HalconWindow.ClearWindow();
             hWindowControl1.HalconWindow.SetPart(0, 0, iWideSize, iWideSize);
             HObject rect;
             HOperatorSet.GenRectangle1(out rect, 0, 0, iWideSize, iWideSize);
             hWindowControl1.HalconWindow.DispObj(rect);
         }
         private void button1_Click(object sender, EventArgs e)
         {
             ShowRect(100);
         }        
         private void button2_Click(object sender, EventArgs e)
         {
             ShowRect(200);
         }

结果：

 经测试：127正常，128就异常，刚好是byte 范围。

如下修改就好了，可能是halcon10的缺陷。

private void button2_Click(object sender, EventArgs e)
         {
             HObject img;
             HOperatorSet.GenImageConst(out img,"byte", 2000, 2000);
             img.Dispose();
             ShowRect(2000);
         }