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.

打開一個終端，運行roscore

2.

打開另一個終端，運行 roslaunch svo_ros test_rig3.launch

出現errror：

忘記關鍵步驟了

$ cd <path_to_catkin_ws>
$ source devel/setup.bash
//顯然這里忽略了對程序進行注冊：也就是執行名為 setup.bash 的腳本文件,它是 catkin_make 在你工作區的 devel 子目錄下生成的。