eclipse进入performance设置ADT地址后点击OK后出现 an error has occurred se

eclipse进入performance设置ADT地址后点击OK后出现 an error has occurred see the log for more details
点开details以后就是
An error has occurred.See error log for more details.
4
只有一个数字4,错误原因也未知.
进入eclipse后如果点击performance然后直接OK的话可以设置Android模拟器但是不能新建Android Project
点了OK就是这个样子