On Mon, Aug 16, 2010 at 4:11 AM, safdar_zaman <safdaraslam@yahoo.com> wrote:
> then I want to see the pose and run
> rostopic echo /amcl_pose  then it prints nothing. while rostopic echo /odom
> gives me odometry data successfully .

Is the robot moving?  The /amcl_pose data is published only on filter
updates, which occur each time the robot has moved a sufficient
distance.  The /tf data is published continuously; this is where most
programs look for the pose estimates produced by amcl.  To see it, try
tf_echo:

$ rosrun tf tf_echo map odom

	brian.