ROS学习过程中，遇到问题：RLException: [xx.launch] is neither a launch file in package [x] nor is [x] a launch file name

出现的问题：

在ROS学习中，进行工作区下编译的时候，突然报错，出现的错误如下：

RLException: [racecar.launch] is neither a launch file in package [racecar_gazebo] nor is [racecar_gazebo] a launch file name
The traceback for the exception was written to the log file

这种错误的出现，是因为坏境变量没有被添加！！！

解决方案

添加环境变量即可
添加环境变量的方法不唯一

这里介绍两种方法，两种方式各有优点

方法一

确保在建立工作空间的时候就已经执行catkin_make

直接在命令行，进入到工作空间，然后执行以下命令：

source ./devel/setup.bash

这种方式，可以直接在命令行中操作，短时间内是看着比较简单的。每次不确定的时候就可以直source一下。

方法二

直接对环境变量文件进行修改

在命令行打开文件./bashrc，命令如下：

sudo  gedit ~/.bashrc

在文件最后加入以下语句：

source ~/work_ws/devel/setup.bash
export ROS_PACKAGE_PATH=${ROS_PACKAGE_PATH}:~/work_ws/

注意： 值得注意的是：这里的work_ws是我的ROS工作的路径，也就是你的ros的工作空间

重启bashrc，直接执行以下语句

source ~/.bashrc

查看ROS路径是否添加上

echo $ROS_PACKAGE_PATH

设置成功的话，就会直接显示添加的路径。

OVER！！！

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RLException: [xx.launch] is neither a launch file in package [x] nor is [x] a launch file name的解决方法

ROS学习过程中，遇到问题：RLException: [xx.launch] is neither a launch file in package [x] nor is [x] a launch file name

出现的问题：

解决方案

方法一

方法二

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