Is that the actual error message? If so, the problem is the "my_machine_name".

What are the settings of your ROS_MASTER_URi, ROS_HOSTNAME, and ROS_IP
environment variables?

 - Ken

On Wed, Sep 15, 2010 at 7:19 AM, trinighost <trinighost@gmail.com> wrote:
>
> Something about the default configuration of c-turtle installed via package
> manager precludes it from being used while my cisco VPN client is running.
>
> roscore will not start and fails with the following message:
>
> Unable to contact my own XML-RPC server, this is a highly unusual error and
> should be reported immediately.  My URI is [http://"my_machine_name":37831/]
>
>
> Any tips or suggestions?
> --
> View this message in context: http://ros-users.122217.n3.nabble.com/ROS-and-virtual-private-networks-tp1480052p1480052.html
> Sent from the ROS-Users mailing list archive at Nabble.com.
> _______________________________________________
> ros-users mailing list
> ros-users@code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>