ROS报错处理(持续更新)
1、运行节点时报错：
[rospack] Error: package 'test' not found
没有找到ros功能包，原因是没有为功能包配置系统环境，可以利用source运行工作空间中devel目录下的setup.bash配置文件并使配置立即生效。setup.bash脚本的作用是让一些ros* 开头的命令可以使用，同时还能够创建一些ROS开头的环境变量eg：ROS_PACKAGE_PATH。在命令行中可以使用echo在~/.bashrc文件中追加以下内容：echo "source ~/catkin_ws/devel/setup.bash" >> ~/.bashrc
2、Could not find a package configuration file provided by "moveit_ros_planning" with any of the following names:
moveit_ros_planningConfig.cmake
moveit_ros_planning-config.cmake
没有安装moveit，可以使用sudo apt-get install ros-kinetic-moveit-full命令来安装。
3、运行launch文件时报错：
[robot_spawn.launch] is neither a launch file in package [robot_sim_demo] nor is [robot_sim_demo] a launch file name
The traceback for the exception was written to the log file
不能识别ros功能包中的launch文件，原因是没有修改系统中存放ros功能包路径的环境变量。可以使用如下命令添加路径：
export ROS_PACKAGE_PATH=${ROS_PACKAGE_PATH}:[path of your ros package]
eg: export ROS_PACKAGE_PATH=${ROS_PACKAGE_PATH}:~/catkin_ws/src
（export命令修改环境变量的方式也能用来解决source覆盖机制）
还有一种可能，是你修改了ros功能包的名称，但是CMakeLists.txt文件和package.xml文件并不会自动修改。然而两个文件中都有关于功能包名的描述，这种情况下只需要修改两个文件中的功能包名称即可。
4、roscore打不开，并报错：
'ascii' codec can't decode byte 0xe6 in position 10: ordinal not in range(128)
The traceback for the exception was written to the log file注意不要在ubuntu桌面上创建ros包，这是因为ros的包路径不允许出现中文，所有ros包的路径都会被系统自动添加到ROS_PACKAGE_PATH和ROSLISP_PACKAGE_DIRECTORIES环境变量中，导致ros启动时出错。
解决方案是：将桌面上的包移动到其他不包含中文的目录中，或者删除这些包。
5、roscore打不开，并报错：
WARNING：ROS_MASTER_URI [http://MSI:11311] host is not set to this machine
原因是在～/.bashrc文件中设置的节点管理器地址不是本机，而是在其他主机上，需要在该主机上打开roscoe或者将节点管理器地址修改为本机(注释掉ROS_MASTER_URI赋值即可，因为默认会将地址设置为本机)。
6、使用catkin_make 初始化或编译工作空间时，报错：
CMake Error at /opt/ros/kinetic/share/catkin/cmake/safe_execute_process.cmake:11 (message):
execute_process(/home/robot/anaconda3/bin/python
"/opt/ros/kinetic/share/catkin/cmake/parse_package_xml.py"
"/opt/ros/kinetic/share/catkin/cmake/../package.xml"
"/home/robot/ros_practice/build/catkin/catkin_generated/version/package.cmake")
returned error code 1
Call Stack (most recent call first):
/opt/ros/kinetic/share/catkin/cmake/catkin_package_xml.cmake:74 (safe_execute_process)
/opt/ros/kinetic/share/catkin/cmake/all.cmake:163 (_catkin_package_xml)
/opt/ros/kinetic/share/catkin/cmake/catkinConfig.cmake:20 (include)
CMakeLists.txt:52 (find_package)
-- Configuring incomplete, errors occurred!
See also "/home/robot/ros_practice/build/CMakeFiles/CMakeOutput.log".
See also "/home/robot/ros_practice/build/CMakeFiles/CMakeError.log".
Invoking "cmake" failed
这是因为安装了ros之后又安装了anaconda，导致系统将默认python更新为anaconda中安装的版本。然而新安装的anaconda中缺少支持ros的相关依赖包，因此需要使用以下命令安装相关的依赖包：
conda install setuptools
pip install -U rosdep rosinstall_generator wstool rosinstall six vcstools
7、刚解决完上一个anaconda和ros共存的问题，又发现ros和python3.*不兼容，很多功能包中的python节点只能运行在python2.*中。否则各种报错。
8、进行分布式多机通信时，电脑之间互相可以ping通，但是节点之间却不能通信。报错：
[ERROR] [1552348968.995103251]: [registerPublisher] Failed to contact master at [MSI:11311], Retrying...
这是因为防火墙没有关闭，注意参与通信的电脑都需要关闭防火墙。
9、roscore启动报错：
WARNING: unable to configure logging. No log files will be generated
Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.
Traceback (most recent call last):
File "/usr/bin/rosversion", line 11, in
load_entry_point('rospkg==1.1.9', 'console_scripts', 'rosversion')()
File "/usr/lib/python2.7/dist-packages/rospkg/rosversion.py", line 109, in main
path = mm.get_path(args.package)
File "/usr/lib/python2.7/dist-packages/rospkg/rospack.py", line 201, in get_path
self._update_location_cache()
File "/usr/lib/python2.7/dist-packages/rospkg/rospack.py", line 184, in _update_location_cache
list_by_path(self._manifest_name, path, cache)
File "/usr/lib/python2.7/dist-packages/rospkg/rospack.py", line 74, in list_by_path
resource_name = root.findtext('name').strip(' \n\r\t')
AttributeError: 'NoneType' object has no attribute 'strip'
Invalid tag: Cannot load command parameter [rosversion]: command [rosversion roslaunch] returned with code [1].
Param xml is
The traceback for the exception was written to the log file
No handlers could be found for logger "roslaunch"
这是因为/usr/lib/python2.7/dist-packages/rospkg路径下的python文件没有可执行权限。进入该路径运行sudo chmod a+x rospack.py和sudo chmod a+x rosversion.py两句命令即可。