第一次运行没问题吧?并再次运行它有一个错误?如果正确，您需要在再次运行之前停止服务.这是停止的方法.点击按钮停止看起来像这张图片

In the first time you run ok right? and run again it got an error? If right, You need stop service before run again. Here is way to stop. Click to button stop look like this image