ROSARIA install on Hydro

Question

Hi,

I'm relatively new to ROS and need to install a couple of packages to control an ActivMedia Powerbot (Pioneer). I am following the tutorial found here but I was unsuccessful in getting it to work. By following this tutorial, everything seemed ok, and the result of catkin_make can be shown below:

rachdar@ubuntu:~/catkin_ws$ catkin_make
Base path: /home/rachdar/catkin_ws
Source space: /home/rachdar/catkin_ws/src
Build space: /home/rachdar/catkin_ws/build
Devel space: /home/rachdar/catkin_ws/devel
Install space: /home/rachdar/catkin_ws/install
####
#### Running command: "cmake /home/rachdar/catkin_ws/src -DCATKIN_DEVEL_PREFIX=/home/rachdar/catkin_ws/devel -DCMAKE_INSTALL_PREFIX=/home/rachdar/catkin_ws/install" in "/home/rachdar/catkin_ws/build"
####
-- Using CATKIN_DEVEL_PREFIX: /home/rachdar/catkin_ws/devel
-- Using CMAKE_PREFIX_PATH: /home/rachdar/catkin_ws/devel;/opt/ros/hydro
-- This workspace overlays: /home/rachdar/catkin_ws/devel;/opt/ros/hydro
-- Using PYTHON_EXECUTABLE: /usr/bin/python
-- Python version: 2.7
-- Using Debian Python package layout
-- Using CATKIN_ENABLE_TESTING: ON
-- Call enable_testing()
-- Using CATKIN_TEST_RESULTS_DIR: /home/rachdar/catkin_ws/build/test_results
-- Found gtest sources under '/usr/src/gtest': gtests will be built
-- catkin 0.5.89
-- BUILD_SHARED_LIBS is on
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- ~~  traversing 1 packages in topological order:
-- ~~  - rosaria
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- +++ processing catkin package: 'rosaria'
-- ==> add_subdirectory(rosaria)
-- Using these message generators: gencpp;genlisp;genpy
-- Boost version: 1.46.1
-- Found the following Boost libraries:
--   thread
-- rosaria: 1 messages, 0 services
-- Configuring done
-- Generating done
-- Build files have been written to: /home/rachdar/catkin_ws/build
####
#### Running command: "make -j1 -l1" in "/home/rachdar/catkin_ws/build"
####
Scanning dependencies of target geometry_msgs_generate_messages_cpp
[  0%] Built target geometry_msgs_generate_messages_cpp
Scanning dependencies of target std_msgs_generate_messages_cpp
[  0%] Built target std_msgs_generate_messages_cpp
Scanning dependencies of target rosaria_generate_messages_cpp
[ 16%] Generating C++ code from rosaria/BumperState.msg
[ 16%] Built target rosaria_generate_messages_cpp
Scanning dependencies of target rosaria_gencpp
[ 16%] Built target rosaria_gencpp
Scanning dependencies of target rosaria_gencfg
[ 33%] Generating dynamic reconfigure files from cfg/RosAria.cfg: /home/rachdar/catkin_ws/devel/include/rosaria/RosAriaConfig.h /home/rachdar/catkin_ws/devel/lib/python2.7/dist-packages/rosaria/cfg/RosAriaConfig.py
Generating reconfiguration files for RosAria in rosaria
Wrote header file in /home/rachdar/catkin_ws/devel/include/rosaria/RosAriaConfig.h
[ 33%] Built target rosaria_gencfg
Scanning dependencies of target RosAria
[ 50%] Building CXX object rosaria/CMakeFiles/RosAria.dir/RosAria.cpp.o
Linking CXX executable /home/rachdar/catkin_ws/devel/lib/rosaria/RosAria
[ 50%] Built target RosAria
Scanning dependencies of target geometry_msgs_generate_messages_py
[ 50%] Built target geometry_msgs_generate_messages_py
Scanning dependencies of target std_msgs_generate_messages_py
[ 50%] Built target std_msgs_generate_messages_py
Scanning dependencies of target rosaria_generate_messages_py
[ 66%] Generating Python from MSG rosaria/BumperState
[ 83%] Generating Python msg __init__.py for rosaria
[ 83%] Built target rosaria_generate_messages_py
Scanning dependencies of target std_msgs_generate_messages_lisp
[ 83%] Built target std_msgs_generate_messages_lisp
Scanning dependencies of target geometry_msgs_generate_messages_lisp
[ 83%] Built target geometry_msgs_generate_messages_lisp
Scanning dependencies of target rosaria_generate_messages_lisp
[100%] Generating Lisp code from rosaria/BumperState.msg
[100%] Built target rosaria_generate_messages_lisp
Scanning dependencies of target rosaria_generate_messages
[100%] Built target rosaria_generate_messages

When I tried the command,

rosrun rosaria RosAria

the following error was obtained:

[ERROR] [1422117443.016309109]: [setParam] Failed to contact master at [localhost:11311].  Retrying...

Can anybody explain this error to me please? When I kill the process, first it connects to the simulator and disconnects immediately. If I don't kill the process, it keeps on retrying to contact master....

^CConnecting to simulator through tcp.

Syncing 0
Syncing 1
Syncing 2
Connected to robot.
Name: MobileSim
Type: Pioneer
Subtype: powerbot-sh
ArConfig: Config version: 2.0
Loaded robot parameters from powerbot-sh.p
ArRobotConnector: Connected to simulator, not connecting to additional hardware components.
Trace/breakpoint trap (core dumped)

Please help.

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Originally posted by RND on ROS Answers with karma: 133 on 2015-01-24

Post score: 0

Answer 1

When I tried the command,

rosrun rosaria RosAria

the following error was obtained:

[ERROR] [1422117443.016309109]: [setParam] Failed to contact master at [localhost:11311].  Retrying...

Well, it is an error, but it also already tells you what is wrong: the node (RosAria) cannot contact the (ROS) master. Most likely because you haven't started it yet.

You mention that you're "relatively new to ROS": have you done the ROS introductory tutorials? I think especially the Understanding ROS Nodes tutorial should help here, and ros/wiki/Master:

The ROS Master provides naming and registration services to the rest of the nodes in the ROS system. It tracks publishers and subscribers to topics as well as services. The role of the Master is to enable individual ROS nodes to locate one another. Once these nodes have located each other they communicate with each other peer-to-peer.

The Master also provides the Parameter Server.

The Master is most commonly run using the roscore command, which loads the ROS Master along with other essential components.

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Originally posted by gvdhoorn with karma: 86574 on 2015-01-24

This answer was ACCEPTED on the original site

Post score: 1