ROS [ERROR]

Unable to contact my own server at [http://fhp:45144/].
This usually means that the network is not configured properly.

A common cause is that the machine cannot ping itself.  Please check
for errors by running:

    ping fhp

For more tips, please see

    http://www.ros.org/wiki/ROS/NetworkSetup

The traceback for the exception was written to the log file

solution:网络不可用,连接网络便可运行