errror:[test_rig3.launch] is neither a launch file in package [svo_ros] nor is [svo_ros] a launch file name The traceback for the exception was written to the log file

1.

打开一个终端，运行roscore

2.

打开另一个终端，运行 roslaunch svo_ros test_rig3.launch

出现errror：

忘记关键步骤了

$ cd <path_to_catkin_ws>
$ source devel/setup.bash
//显然这里忽略了对程序进行注册：也就是执行名为 setup.bash 的脚本文件,它是 catkin_make 在你工作区的 devel 子目录下生成的。