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2014-01-28 17:27:25 -0600 marked best answer Rviz error: undefined symbol: _ZN9QListData11detach_growEPii

Hi folks,

I got the symbol lookup error while running: rosrun rviz rviz

/opt/ros/fuerte/stacks/visualization/rviz/bin/rviz: symbol lookup error: /opt/ros/fuerte/stacks/visualization/rviz/lib/librviz.so: undefined symbol: _ZN9QListData11detach_growEPii

Just happened after got update by Ubuntu Update Manager System: Ubuntu 12.04 32 bit, ROS Fuerte

2014-01-28 17:22:38 -0600 marked best answer tf tutorial: turtle2 doesn't follow turtle1

I'm working on this tutorial: http://www.ros.org/wiki/tf/Tutorials/... After execute "roslaunch turtle_tf turtle_tf_demo.launch" I can see 2 turtles spawned, however turtle2 doesn't move. Output of "rosrun tf tf_echo turtle1 turtle2" is

At time 1310028986.770 - Translation: [-3.380, 3.556, 0.000] - Rotation: in Quaternion [0.000, 0.000, 0.000, 1.000] in RPY [0.000, -0.000, 0.000]

I'm using ROS diamondback in Ubuntu 10.04

2014-01-28 17:21:59 -0600 marked best answer Cannot run roscore, rosmake with python 3

Hi all,

I got SyntaxError when run roscore, rosmake, rosversion ...

tienthanh@tienthanh-pc:~$ roscore
Traceback (most recent call last):
 File "/opt/ros/diamondback/ros/bin/roscore", line 34, in <module>
    from ros import roslaunch
  File "/opt/ros/diamondback/ros/core/roslib/src/ros/__init__.py", line 55
    except roslib.packages.InvalidROSPkgException, e:
                                                 ^
SyntaxError: invalid syntax

tienthanh@tienthanh-pc:~$ roscd rgbdslam && rosmake --rosdep-install rgbdslam
  File "/opt/ros/diamondback/ros/bin/rosmake", line 46
    print "Rospack failed to build" 
                                  ^
tienthanh@tienthanh-pc:/opt/ros/diamondback/stacks/rgbdslam$ rosversion
  File "/opt/ros/diamondback/ros/bin/rosversion", line 55
    except Exception, e:
                    ^
SyntaxError: invalid syntax
2014-01-28 17:21:42 -0600 marked best answer VSlam error while running tutorial.bag

Hi all,

I got this error while running vslam-tutorial.bag and of course it can't run

Waiting 0.2 seconds after advertising topics... done.

Hit space to toggle paused, or 's' to step.

Client [/wide_stereo/stereo_vslam_node] wants topic /wide_stereo/right/camera_info to have datatype/md5sum [sensor_msgs/CameraInfo/c9a58c1b0b154e0e6da7578cb991d214], but our version has [sensor_msgs/CameraInfo/1b5cf7f984c229b6141ceb3a955aa18f]. Dropping connection.

Client [/wide_stereo/stereo_vslam_node] wants topic /wide_stereo/left/camera_info to have datatype/md5sum [sensor_msgs/CameraInfo/c9a58c1b0b154e0e6da7578cb991d214], but our version has [sensor_msgs/CameraInfo/1b5cf7f984c229b6141ceb3a955aa18f]. Dropping connection.

How can I solve this problem?

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2012-11-06 12:17:36 -0600 answered a question Planning sequence of motion using arm_navigation/moveit

Problem is solved:

vector< double > state_vector;

gc.end_state_->getKinematicStateValues(state_vector);

gc.start_state_->setKinematicState(state_vector);

2012-11-06 11:37:01 -0600 asked a question Planning sequence of motion using arm_navigation/moveit

Hi,

I would like to planning sequence of motion with planning_component_visualizer. In the menu handler, there are only the option: set start and set end position.I would like to add option: "set next motion" which will swap the current end_state_ to a new start_state_ and selectmarker from the new start_state_ to set new goal. But I don't know how to set new start_state_ to "current" end_state_ (which is KinematicState), therefore, the start_state_ also changes when I start move the marker to the new end_state.

Is there any way to get the current KinematicState?

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2012-09-27 11:35:51 -0600 answered a question PCL Segmentation in ROS: Missing headers

As far as I know, min_cut_segmentation.h is not in perception_pcl in ROS. You can find it in PCL 1.7 source code.

2012-09-24 11:32:52 -0600 asked a question arm_navigation for custom simulated manipulator, publish JointTrajectory

Hi all,

I'm doing motion planning for a custom-built manipulator using ompl. To control the manipulator, I need to provide a text file which include the JointTrajectory message to the low-level controller (offline). I used ompl for a simulated manipulator, and try to generated a text file from JointTrajectory message.

However, while execute launch file planning_components_visualizer.launch , the JointTrajectory and ik_solution_display is not published.

There is JointTrajectoryAction to publish trajectory_msgs/JointTrajectory but for non PR2, a joint_trajectory_action_controller must be written.

Is it the only way I can get the JointTrajectory from the simulated manipulator? Any example for joint_trajectory_action_controller with a simulated robot? What will be the different in writing for the real one and writing for a simulated one?

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2012-09-19 04:17:57 -0600 answered a question SMACH tutorial: ImportError: No module named msg

Not sure it's the answer, but Getting_started tutorial works after several changes:

As Jbohren said in smach_tutorials/examples/actionlib.py I change - from actionlib.msg import * + from actionlib_msgs.msg import *

in /smach_ros/src/smach_ros/action_server_wrapper.py - from actionlib.simple_action_server import SimpleActionServer

in /smach_ros/src/smach_ros/simple_action_state.py - from actionlib.simple_action_client import SimpleActionClient, GoalStatus

(-: remove line and +: add line)

2012-09-19 02:50:02 -0600 commented answer SMACH tutorial: ImportError: No module named msg

I change in smach_tutorials/examples/actionlib.py as you advice: from actionlib_msgs.msg import *

But I got another error: ... action_server_wrapper.py", line 9, in <module> from actionlib.simple_action_server import SimpleActionServer ImportError: No module named simple_action_server

2012-09-18 10:26:23 -0600 answered a question Rviz error: undefined symbol: _ZN9QListData11detach_growEPii

Problem solved. Actually, I got install a 3rd party package with libqtGui.so.4.6.2 in /usr/lib. Just remove it then everything is fine.

2012-09-18 10:23:42 -0600 asked a question SMACH tutorial: ImportError: No module named msg

I got error while trying to run the ./examples/state_machine.py in smach_tutorials package

Traceback (most recent call last): File "/home/tienthanh/workspace/ros/fuerte/mebios/tienthanh/executive_smach_tutorials/smach_tutorials/examples/state_machine.py", line 21, in <module> import smach_ros File "/opt/ros/fuerte/stacks/executive_smach/smach_ros/src/smach_ros/__init__.py", line 55, in <module> from action_server_wrapper import ActionServerWrapper File "/opt/ros/fuerte/stacks/executive_smach/smach_ros/src/smach_ros/action_server_wrapper.py", line 9, in <module> from actionlib.simple_action_server import SimpleActionServer File "/home/tienthanh/workspace/ros/fuerte/mebios/tienthanh/executive_smach_tutorials/smach_tutorials/examples/actionlib.py", line 27, in <module> from actionlib.msg import * ImportError: No module named msg

Output of "echo $PYTHONPATH" is /opt/ros/fuerte/share/ros/core/roslib/src:/opt/ros/fuerte/lib/python2.7/dist-packages:

I use ROS fuerte, Ubuntu 12.04 32 bit.