Fail to use the mentioned tests

[JeffChanxf]

I set up the env as instructed by the ROS tutorial, except that I use the melodic version since I am running ROS in Ubuntu18.04.
And the ROS env is working well with the testing sample provided by https://github.com/uzh-rpg/rpg_dvs_ros.

However, after successfully build the tracking project in the new work space, I found I couldn't have a GUI running and showing the tracked results on my PC. The followings are the screenshots that I recorded.

1. Successful build
   

2. set up a roscore, and running a .bag file downloaded from https://grvc.us.es/davis-dataset-for-intrusion-monitoring/
   
   It's just displaying the data in the .bag file:
   

3. After I open another terminal and source the setup files, there is a roslaunch problems:
   And I didn't connect any dvs cameras to the PC, although what I got is a DVXplorer camera which seems to be useless in this case if I want to run some real-time test.
   

Therefore, how can I get the exact tracking results with those pre-recorded bag files. Thanks, hope to get reply soon.

[fbarranco]

Hi @JeffChanxf,
are you sourcing the setup.bash in both consoles? It looks like it is not finding the nodes or the launching files (your RLException says it cannot find the file or it is not present). About DVXplorer, sorry, I haven't used that device ...