Map topic data not published on remote computer

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Hi all,

I'm using ROS to run my own differential drive robot. Since my robot is powered by a UDOO board I'm using a minimal Ubuntu installation without GUI so I cannot run rviz on this device. For this reason I use a second laptop with ubuntu in order to control my robot. Roscore and the complete navigation stack (AMCL, move base, gmapping...) runs on the UDOO board and only rviz is running on remote laptop.

On rviz I'm able to see the laser scan, the robot pose and another topics data but I'm not able to see the map data (the topic is there and also listed by rostopic list).

In order to understand what is going I try to show topic data from the remote system:

rostopic echo scan

show me scan data. Instead typing

rostopic echo map

does not shown any data. The strange thing is that the same test, performed on the system running Roscore, show me topic data for map topic too. It seems that map data only is not sent/received on the remote system!

I'm using ROS hydro and already try to update all packages on two systems and I made a succesfull network test.

Any idea about this behavior?

Thanks Ale

UPDATE

After some tests I notice that some map topic data are published on remote PC but not every one sent by my navigation stack. Some idea about possible reason?