<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>i have ubuntu 10.04. i have installed ROS using the precompiled binaries(karmic ubuntu 9.10) method. i installed ROS only(didn't install base and pr2).<br><br>i was following the tutorials when i came across a few problems.<br><br>1. in this <a href="http://www.ros.org/wiki/ROS/Tutorials/NavigatingTheFilesystem">http://www.ros.org/wiki/ROS/Tutorials/NavigatingTheFilesystem</a><br><br>the command<br><pre>"rospack find roscpp"<br><br>returns<br><br>narasimhan@narasimhan-desktop:/opt/ros/boxturtle/ros$ rospack find roscpp<br>[rospack] opendir error [No such file or directory] while crawling /opt/ros/boxturtle/stacks<br>/opt/ros/boxturtle/ros/core/roscpp<br><br>and if i execute the same command again it returns<br><br>/opt/ros/boxturtle/ros/core/roscpp<br><br>why does the "[rospack] opendir error
[No such file or directory] while crawling /opt/ros/boxturtle/stacks" occurs the first time but not the 2nd time.<br><br>2. the output of these commands<br>$ roscd roscpp<br>$ pwd<br>is<br>/opt/ros/boxturtle/ros/core/roscpp<br>but the one shown in the tutorial is<br>~/ros/ros/core/roscpp<br>and in the next tutorial <a href="http://www.ros.org/wiki/ROS/Tutorials/CreatingPackage">http://www.ros.org/wiki/ROS/Tutorials/CreatingPackage</a><br>the output of commands<br>$ roscd beginner_tutorials <br>$ pwd<br>is<br>/home/narasimhan/ros-tutorials/ros_tutorials/beginner_tutorials<br>but the one shown in the tutorial is<br>~/ros/pkgs/ros_tutorials/beginner_tutorials<br>my guess is that the tutorials given in the website are written using some previous version of ros<br><br>3.the command "ros log" gives<br>No active roscore<br>bash: cd: /home/narasimhan/.ros/log: No such file or directory<br><br>4.in this <a
href="http://www.ros.org/wiki/ROS/Tutorials/NavigatingTheFilesystem">http://www.ros.org/wiki/ROS/Tutorials/NavigatingTheFilesystem</a><br>the following packages does not exist in my ROS<br>rosls ethercat_hardware/<br><br>rosls laser_<br>laser_assembler/ laser_geometry/<br>laser_camera_calibration/ laser_head_updater/<br>laser_cb_detector/ laser_joint_processor/<br>laser_cb_processing/ laser_pipeline/<br>laser_drivers/ laser_scan_publisher_tutorial/<br>laser_filters/<br><br>only laser_scan_publisher_tutorial/ exists.<br><br>5.in this tutorial <a href="http://www.ros.org/wiki/ROS/Tutorials/BuildingPackages">http://www.ros.org/wiki/ROS/Tutorials/BuildingPackages</a><br>the command<br>"rosdep install turtlesim"<br>gives output as<br>"executing this script:<br> set -o errexit<br>#No Packages to install"<br><br>is this ok?<br><br>6.the command<br>$ roscd turtle_teleop<br>$ svn up<br>gives output
as<br>At revision 29804.<br><br>the command<br>$ roscd <br>$ svn up<br>gives output<br>Skipped '.'<br><br>is these outputs normal?<br><br>7.the command<br>"rosdep install turtle_teleop rxtools"<br>gives output<br>narasimhan@narasimhan-desktop:/opt/ros/boxturtle/ros$ rosdep install turtle_teleop rxtools<br>"[rosstack] opendir error [No such file or directory] while crawling /opt/ros/boxturtle/stacks<br>Failed to find stack for package [joy]<br>Failed to load rosdep.yaml for package [joy]:Cannot locate installation of package joy: [rospack] opendir error [No such file or directory] while crawling /opt/ros/boxturtle/stacks<br>[rospack] couldn't find package [joy]. ROS_ROOT[/opt/ros/boxturtle/ros] ROS_PACKAGE_PATH[/home/narasimhan/ros-tutorials/ros_tutorials:/home/narasimhan/ros-tutorials/ros_pkg_tutorials:/opt/ros/boxturtle/stacks]<br>Failed to find stack for package [spacenav_node]<br>Failed to load rosdep.yaml for package [spacenav_node]:Cannot locate
installation of package spacenav_node: [rospack] opendir error [No such file or directory] while crawling /opt/ros/boxturtle/stacks<br>[rospack] couldn't find package [spacenav_node]. ROS_ROOT[/opt/ros/boxturtle/ros] ROS_PACKAGE_PATH[/home/narasimhan/ros-tutorials/ros_tutorials:/home/narasimhan/ros-tutorials/ros_pkg_tutorials:/opt/ros/boxturtle/stacks]<br>Failed to find stack for package [ps3joy]<br>Failed to load rosdep.yaml for package [ps3joy]:Cannot locate installation of package ps3joy: [rospack] opendir error [No such file or directory] while crawling /opt/ros/boxturtle/stacks<br>[rospack] couldn't find package [ps3joy]. ROS_ROOT[/opt/ros/boxturtle/ros] ROS_PACKAGE_PATH[/home/narasimhan/ros-tutorials/ros_tutorials:/home/narasimhan/ros-tutorials/ros_pkg_tutorials:/opt/ros/boxturtle/stacks]<br>Failed to find stack for package [wiimote]<br>Failed to load rosdep.yaml for package [wiimote]:Cannot locate installation of package wiimote: [rospack]
opendir error [No such file or directory] while crawling /opt/ros/boxturtle/stacks<br>[rospack] couldn't find package [wiimote]. ROS_ROOT[/opt/ros/boxturtle/ros] ROS_PACKAGE_PATH[/home/narasimhan/ros-tutorials/ros_tutorials:/home/narasimhan/ros-tutorials/ros_pkg_tutorials:/opt/ros/boxturtle/stacks]<br>[rosstack] opendir error [No such file or directory] while crawling /opt/ros/boxturtle/stacks<br>[rosstack] couldn't find dependency [joystick_drivers] of [ros_pkg_tutorials]<br>[rosstack] missing dependency<br>executing this script:<br> set -o errexit<br>#No Packages to install"<br><br>i think the problem here is in the manifest file of both turtle_teleop and rxtools there is no row specifying system dependencies.<br><br>thanks for reading and please help<br></pre></div>
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