Hello,

I don't know what is going on with my turtlebot2. I had many problems while I was working with turtlebot tutorials

http://www.ros.org/wiki/turtlebot/Tutorials

For example, when I try

roslaunch turtlebot_follower follower.launch

I get

... logging to /home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/roslaunch-turtlebot-1025C-3596.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://153.91.222.65:47181/

SUMMARY
========

PARAMETERS
 * /camera/depth/rectify_depth/interpolation
 * /camera/depthimage_to_laserscan_loader/output_frame_id
 * /camera/depthimage_to_laserscan_loader/range_min
 * /camera/follower/goal_z
 * /camera/follower/max_x
 * /camera/follower/max_y
 * /camera/follower/max_z
 * /camera/follower/min_x
 * /camera/follower/min_y
 * /camera/follower/x_scale
 * /camera/follower/z_scale
 * /camera/openni_camera_loader/depth_frame_id
 * /camera/openni_camera_loader/depth_mode
 * /camera/openni_camera_loader/depth_registration
 * /camera/openni_camera_loader/depth_time_offset
 * /camera/openni_camera_loader/image_mode
 * /camera/openni_camera_loader/image_time_offset
 * /camera/openni_camera_loader/rgb_frame_id
 * /follower_velocity_smoother/accel_lim_v
 * /follower_velocity_smoother/accel_lim_w
 * /follower_velocity_smoother/decel_factor
 * /follower_velocity_smoother/frequency
 * /follower_velocity_smoother/speed_lim_v
 * /follower_velocity_smoother/speed_lim_w
 * /rosdistro
 * /rosversion

NODES
  /camera/
    camera_nodelet_manager (nodelet/nodelet)
    depthimage_to_laserscan_loader (nodelet/nodelet)
    follower (nodelet/nodelet)
    openni_camera_loader (nodelet/nodelet)
  /camera/depth/
    points (nodelet/nodelet)
    rectify_depth (nodelet/nodelet)
  /
    follower_velocity_smoother (nodelet/nodelet)

ROS_MASTER_URI=http://153.91.222.65:11311

core service [/rosout] found
process[follower_velocity_smoother-1]: started with pid [4095]
process[camera/camera_nodelet_manager-2]: started with pid [4160]
process[camera/openni_camera_loader-3]: started with pid [4205]
[ERROR] [1361143832.773250146]: Failed to load nodelet [/camera/openni_camera_loader] of type [openni_camera/driver]: Failed to load library /opt/ros/groovy/lib//libopenni_nodelet.so. Make sure that you are calling the PLUGINLIB_EXPORT_CLASS macro in the library code, and that names are consistent between this macro and your XML. Error string: Could not load library (Poco exception = /opt/ros/groovy/lib//libopenni_nodelet.so: undefined symbol: _ZN12class_loader20class_loader_private22AbstractMetaObjectBaseC2ERKSsS3_)
[FATAL] [1361143832.787996783]: Service call failed!
[camera/openni_camera_loader-3] process has died [pid 4205, exit code 255, cmd /opt/ros/groovy/lib/nodelet/nodelet load openni_camera/driver camera_nodelet_manager __name:=openni_camera_loader __log:=/home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/camera-openni_camera_loader-3.log].
log file: /home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/camera-openni_camera_loader-3*.log
respawning...
[camera/openni_camera_loader-3] restarting process
process[camera/openni_camera_loader-3]: started with pid [4271]
process[camera/depth/rectify_depth-4]: started with pid [4310]
[ERROR] [1361143833.785294962]: Failed to load nodelet [/camera/openni_camera_loader] of type [openni_camera/driver]: MultiLibraryClassLoader: Could not create object of class type openni_camera::DriverNodelet as no factory exists for it. Make sure that the library exists and was explicitly loaded through MultiLibraryClassLoader::loadLibrary()
[FATAL] [1361143833.802495745]: Service call failed!
[ERROR] [1361143833.803931278]: Failed to find nodelet with name '/camera/depth/rectify_depth' to unload.
[FATAL] [1361143833.809957110]: Service call failed!

also, when I try

roslaunch turtlebot_navigation gmapping_demo.launch

I get

... logging to /home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/roslaunch-turtlebot-1025C-15139.log
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://153.91.222.65:47114/

SUMMARY
========

PARAMETERS
 * /camera/depthimage_to_laserscan_loader/output_frame_id
 * /camera/depthimage_to_laserscan_loader/range_min
 * /camera/openni_camera_loader/depth_frame_id
 * /camera/openni_camera_loader/depth_mode
 * /camera/openni_camera_loader/depth_registration
 * /camera/openni_camera_loader/depth_time_offset
 * /camera/openni_camera_loader/image_mode
 * /camera/openni_camera_loader/image_time_offset
 * /camera/openni_camera_loader/rgb_frame_id
 * /move_base/TrajectoryPlannerROS/acc_lim_th
 * /move_base/TrajectoryPlannerROS/acc_lim_x
 * /move_base/TrajectoryPlannerROS/acc_lim_y
 * /move_base/TrajectoryPlannerROS/dwa
 * /move_base/TrajectoryPlannerROS/goal_distance_bias
 * /move_base/TrajectoryPlannerROS/heading_lookahead
 * /move_base/TrajectoryPlannerROS/holonomic_robot
 * /move_base/TrajectoryPlannerROS/max_rotational_vel
 * /move_base/TrajectoryPlannerROS/max_vel_x
 * /move_base/TrajectoryPlannerROS/min_in_place_rotational_vel
 * /move_base/TrajectoryPlannerROS/min_vel_x
 * /move_base/TrajectoryPlannerROS/oscillation_reset_dist
 * /move_base/TrajectoryPlannerROS/path_distance_bias
 * /move_base/TrajectoryPlannerROS/sim_time
 * /move_base/TrajectoryPlannerROS/vtheta_samples
 * /move_base/TrajectoryPlannerROS/vx_samples
 * /move_base/TrajectoryPlannerROS/xy_goal_tolerance
 * /move_base/TrajectoryPlannerROS/yaw_goal_tolerance
 * /move_base/controller_frequency
 * /move_base/global_costmap/bump/clearing
 * /move_base/global_costmap/bump/data_type
 * /move_base/global_costmap/bump/marking
 * /move_base/global_costmap/bump/topic
 * /move_base/global_costmap/global_frame
 * /move_base/global_costmap/inflation_radius
 * /move_base/global_costmap/max_obstacle_height
 * /move_base/global_costmap/observation_sources
 * /move_base/global_costmap/obstacle_range
 * /move_base/global_costmap/publish_frequency
 * /move_base/global_costmap/raytrace_range
 * /move_base/global_costmap/robot_base_frame
 * /move_base/global_costmap/robot_radius
 * /move_base/global_costmap/scan/clearing
 * /move_base/global_costmap/scan/data_type
 * /move_base/global_costmap/scan/marking
 * /move_base/global_costmap/scan/topic
 * /move_base/global_costmap/static_map
 * /move_base/global_costmap/transform_tolerance
 * /move_base/global_costmap/update_frequency
 * /move_base/local_costmap/bump/clearing
 * /move_base/local_costmap/bump/data_type
 * /move_base/local_costmap/bump/marking
 * /move_base/local_costmap/bump/topic
 * /move_base/local_costmap/global_frame
 * /move_base/local_costmap/height
 * /move_base/local_costmap/inflation_radius
 * /move_base/local_costmap/max_obstacle_height
 * /move_base/local_costmap/observation_sources
 * /move_base/local_costmap/obstacle_range
 * /move_base/local_costmap/publish_frequency
 * /move_base/local_costmap/raytrace_range
 * /move_base/local_costmap/resolution
 * /move_base/local_costmap/robot_base_frame
 * /move_base/local_costmap/robot_radius
 * /move_base/local_costmap/rolling_window
 * /move_base/local_costmap/scan/clearing
 * /move_base/local_costmap/scan/data_type
 * /move_base/local_costmap/scan/marking
 * /move_base/local_costmap/scan/topic
 * /move_base/local_costmap/static_map
 * /move_base/local_costmap/transform_tolerance
 * /move_base/local_costmap/update_frequency
 * /move_base/local_costmap/width
 * /navigation_velocity_smoother/accel_lim_v
 * /navigation_velocity_smoother/accel_lim_w
 * /navigation_velocity_smoother/decel_factor
 * /navigation_velocity_smoother/frequency
 * /navigation_velocity_smoother/speed_lim_v
 * /navigation_velocity_smoother/speed_lim_w
 * /rosdistro
 * /rosversion
 * /slam_gmapping/angularUpdate
 * /slam_gmapping/astep
 * /slam_gmapping/base_frame
 * /slam_gmapping/delta
 * /slam_gmapping/iterations
 * /slam_gmapping/kernelSize
 * /slam_gmapping/lasamplerange
 * /slam_gmapping/lasamplestep
 * /slam_gmapping/linearUpdate
 * /slam_gmapping/llsamplerange
 * /slam_gmapping/llsamplestep
 * /slam_gmapping/lsigma
 * /slam_gmapping/lskip
 * /slam_gmapping/lstep
 * /slam_gmapping/map_update_interval
 * /slam_gmapping/maxUrange
 * /slam_gmapping/odom_frame
 * /slam_gmapping/ogain
 * /slam_gmapping/particles
 * /slam_gmapping/resampleThreshold
 * /slam_gmapping/sigma
 * /slam_gmapping/srr
 * /slam_gmapping/srt
 * /slam_gmapping/str
 * /slam_gmapping/stt
 * /slam_gmapping/temporalUpdate
 * /slam_gmapping/xmax
 * /slam_gmapping/xmin
 * /slam_gmapping/ymax
 * /slam_gmapping/ymin

NODES
  /camera/
    camera_nodelet_manager (nodelet/nodelet)
    depthimage_to_laserscan_loader (nodelet/nodelet)
    openni_camera_loader (nodelet/nodelet)
  /
    move_base (move_base/move_base)
    navigation_velocity_smoother (nodelet/nodelet)
    slam_gmapping (gmapping/slam_gmapping)

ROS_MASTER_URI=http://153.91.222.65:11311

core service [/rosout] found
process[camera/camera_nodelet_manager-1]: started with pid [15350]
process[camera/openni_camera_loader-2]: started with pid [15364]
process[camera/depthimage_to_laserscan_loader-3]: started with pid [15420]
process[slam_gmapping-4]: started with pid [15516]
process[navigation_velocity_smoother-5]: started with pid [15674]
[ERROR] [1361144277.159057628]: Failed to load nodelet [/navigation_velocity_smoother] of type [yocs_velocity_smoother/VelocitySmootherNodelet]: MultiLibraryClassLoader: Could not create object of class type yocs_velocity_smoother::VelocitySmootherNodelet as no factory exists for it. Make sure that the library exists and was explicitly loaded through MultiLibraryClassLoader::loadLibrary()
[FATAL] [1361144277.161169965]: Service call failed!
[navigation_velocity_smoother-5] process has died [pid 15674, exit code 255, cmd /opt/ros/groovy/lib/nodelet/nodelet load yocs_velocity_smoother/VelocitySmootherNodelet mobile_base_nodelet_manager navigation_velocity_smoother/odometry:=odom navigation_velocity_smoother/raw_cmd_vel:=cmd_vel_mux/input/navi_raw navigation_velocity_smoother/smooth_cmd_vel:=cmd_vel_mux/input/navi __name:=navigation_velocity_smoother __log:=/home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/navigation_velocity_smoother-5.log].
log file: /home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/navigation_velocity_smoother-5*.log
process[move_base-6]: started with pid [15798]
/opt/ros/groovy/stacks/navigation/move_base/bin/move_base: symbol lookup error: /opt/ros/groovy/stacks/navigation/move_base/bin/move_base: undefined symbol: _ZN12class_loader11ClassLoader37has_unmananged_instance_been_created_E
[move_base-6] process has died [pid 15798, exit code 127, cmd /opt/ros/groovy/stacks/navigation/move_base/bin/move_base cmd_vel:=cmd_vel_mux/input/navi_raw __name:=move_base __log:=/home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/move_base-6.log].
log file: /home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/move_base-6*.log
[ERROR] [1361144293.298039903]: Failed to load nodelet [/camera/depthimage_to_laserscan_loader] of type [depthimage_to_laserscan/DepthImageToLaserScanNodelet]: Failed to load library /opt/ros/groovy/lib//libDepthImageToLaserScanNodelet.so. Make sure that you are calling the PLUGINLIB_EXPORT_CLASS macro in the library code, and that names are consistent between this macro and your XML. Error string: Could not load library (Poco exception = /opt/ros/groovy/lib//libDepthImageToLaserScanNodelet.so: undefined symbol: _ZN12class_loader20class_loader_private22AbstractMetaObjectBaseC2ERKSsS3_)
[FATAL] [1361144293.299752632]: Service call failed!
[ERROR] [1361144293.622573980]: Failed to load nodelet [/camera/openni_camera_loader] of type [openni_camera/driver]: Failed to load library /opt/ros/groovy/lib//libopenni_nodelet.so. Make sure that you are calling the PLUGINLIB_EXPORT_CLASS macro in the library code, and that names are consistent between this macro and your XML. Error string: Could not load library (Poco exception = /opt/ros/groovy/lib//libopenni_nodelet.so: undefined symbol: _ZN12class_loader20class_loader_private22AbstractMetaObjectBaseC2ERKSsS3_)
[FATAL] [1361144293.624665705]: Service call failed!
[camera/depthimage_to_laserscan_loader-3] process has died [pid 15420, exit code 255, cmd /opt/ros/groovy/lib/nodelet/nodelet load depthimage_to_laserscan/DepthImageToLaserScanNodelet camera_nodelet_manager image:=/camera/depth/image_raw scan:=/scan __name:=depthimage_to_laserscan_loader __log:=/home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/camera-depthimage_to_laserscan_loader-3.log].
log file: /home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/camera-depthimage_to_laserscan_loader-3*.log
[camera/openni_camera_loader-2] process has died [pid 15364, exit code 255, cmd /opt/ros/groovy/lib/nodelet/nodelet load openni_camera/driver camera_nodelet_manager __name:=openni_camera_loader __log:=/home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/camera-openni_camera_loader-2.log].
log file: /home/turtlebot/.ros/log/0dbf0a06-7957-11e2-8a07-446d57c58c65/camera-openni_camera_loader-2*.log
respawning...
[camera/openni_camera_loader-2] restarting process
process[camera/openni_camera_loader-2]: started with pid [17347]
^C[slam_gmapping-4] killing on exit
[camera/openni_camera_loader-2] killing on exit
[camera/camera_nodelet_manager-1] killing on exit
[ERROR] [1361144294.541379265]: Failed to load nodelet [/camera/openni_camera_loader] of type [openni_camera/driver]: MultiLibraryClassLoader: Could not create object of class type openni_camera::DriverNodelet as no factory exists for it. Make sure that the library exists and was explicitly loaded through MultiLibraryClassLoader::loadLibrary()

also, when I try

roslaunch turtlebot_teleop keyboard_teleop.launch

It works

Control Your Turtlebot!
---------------------------
Moving around:
   u    i    o
   j    k    l
   m    ,    .

q/z : increase/decrease max speeds by 10%
w/x : increase/decrease only linear speed by 10%
e/c : increase/decrease only angular speed by 10%
space key, k : force stop
anything else : stop smoothly

CTRL-C to quit

But when I press keys, the robot doesn't move.

I don't know what is wrong. I would appreciate if anyone could help me.

Thank you.