CST MWS仿真问题请各位帮帮忙

在使用parameter sweep仿真时，出现could not connect to cst main controller please make sure that the address and port is valid and the server is running
这是怎么回事?请各位帮帮忙

没遇到过，
应该是地址和端口错误，
或者服务器没有允许。