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2015-08-31 07:40:33 -0500 asked a question passing image as a message

I would like to understand this function

 void image_callback(sensor_msgs::ImageConstPtr image)
  ROS_DEBUG_STREAM("VO:image_callback{" << ros::Time::now() << "} seq=" << image->header.seq);

  static nav_msgs::Odometry odom_output;

/* vo->on_image(&image->data[0], (image->encoding == "bgr8" ? false : true), image->width, image->height, &odom_output.twist.twist.linear.x, &odom_output.twist.twist.angular.z);

  odom_output.header.stamp = image->header.stamp;



2015-08-31 07:37:41 -0500 commented answer Can't compile with catkin_make

I run the command source source /opt/ros/indigo/setup.bash source /opt/ros/indigo/setup.bash and source :~/catkin_ws/devel/setup.bash

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2015-05-23 07:26:18 -0500 asked a question Moving a robot for SLAM

I am working on ratSLAM. I want to move the robot to a precise goal. What should I do? Thanks

2015-05-23 06:39:46 -0500 commented answer Can't compile with catkin_make

I removed /opt/ros/indigo/ros folder that contains another package created before: sudo rm -r /opt/ros/indigo/ros Then I can run catkin_make

2015-05-23 05:59:28 -0500 answered a question Can't compile with catkin_make

It's OK. I arrive to run my package by resolving the conflicts. Thanks

2015-05-21 06:49:49 -0500 received badge  Popular Question (source)
2015-05-20 09:57:47 -0500 asked a question Can't compile with catkin_make


I'd like to use catkin_make command to compile a package, So I create a folder src in my workspace with mkdir, then use catkin_init_workspace to initialize the package. But when runing catkin_make I obtain the following error even if my src folder is empty:

/opt/ros/indigo/share/catkin/cmake/em/order_packages.cmake.em:23: error: <type 'exceptions.RuntimeError'>: Multiple packages found with the same name "ros":
- ros
- share/ros
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/", line 3276, in <module>
    if __name__ == '__main__': main()
  File "/usr/lib/python2.7/dist-packages/", line 3274, in main
  File "/usr/lib/python2.7/dist-packages/", line 3257, in invoke
    interpreter.wrap(interpreter.file, (file, name))
  File "/usr/lib/python2.7/dist-packages/", line 2262, in wrap
  File "/usr/lib/python2.7/dist-packages/", line 2253, in wrap
  File "/usr/lib/python2.7/dist-packages/", line 2326, in file, done, locals)
  File "/usr/lib/python2.7/dist-packages/", line 2368, in safe
    self.parse(scanner, locals)
  File "/usr/lib/python2.7/dist-packages/", line 2388, in parse, locals)
  File "/usr/lib/python2.7/dist-packages/", line 1403, in run
    interpreter.execute(self.code, locals)
  File "/usr/lib/python2.7/dist-packages/", line 2565, in execute
    exec(statements, self.globals)
  File "<string>", line 17, in <module>
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/", line 111, in topological_order
    for path, package in find_packages(space).items():
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/", line 92, in find_packages
    raise RuntimeError('\n'.join(duplicates))
RuntimeError: Multiple packages found with the same name "ros":
- ros
- share/ros
CMake Error at /opt/ros/indigo/share/catkin/cmake/safe_execute_process.cmake:11 (message):

  "/usr/bin/python" "/usr/lib/python2.7/dist-packages/em.pyc" "--raw-errors"
  "-F" "/home/limiarf/catkin_ws/build/catkin_generated/"
  "-o" "/home/limiarf/catkin_ws/build/catkin_generated/order_packages.cmake"
  "/opt/ros/indigo/share/catkin/cmake/em/order_packages.cmake.em") returned
  error code 1
Call Stack (most recent call first):
  /opt/ros/indigo/share/catkin/cmake/em_expand.cmake:25 (safe_execute_process)
  /opt/ros/indigo/share/catkin/cmake/catkin_workspace.cmake:29 (em_expand)
  CMakeLists.txt:63 (catkin_workspace)

-- Configuring incomplete, errors occurred!
See also "/home/limiarf/catkin_ws/build/CMakeFiles/CMakeOutput.log".
See also "/home/limiarf/catkin_ws/build/CMakeFiles/CMakeError.log".
Invoking "cmake" failed

What should I do?

Thanks Younès

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2014-08-17 22:49:09 -0500 edited question Error with rosdep


When I tap the command:

rosdep install --from-paths src --ignore-src --rosdistro hydro -y

I get the error:

ERROR: Rosdep experienced an internal error. Please go to the rosdep page [1] and file a bug report with the message below. [1] :

rosdep version: 0.10.30

Bad installer [homebrew]: 0

What should I do?