Hello all,

I have launched a navigation stack along with rviz. I have also set 
destination through rviz. According to odometry tutorial i have set x, y, 
and constant velocity. 
Initially for some period it works fine but after some amount of time it 
looses tf connectivity automatically by showing below error.

[ERROR] 1280838295.723091000: Connectivity Error: Could not find a common 
time /base_link and /map.

Is it not taking time stamp correctly? as i said it works fine initially. 

- Prasad Dixit