I ran it in the order you said. There was no problem running yolov3tiny.launch, but an error was reported when running sort.launch. The error is below, and the PY file gave permissions.

[xiaoyang12333]

usr/bin/env: “python”: 没有那个文件或目录

[Buttosaii]

Hi @xiaoyang12333 @ilyasmg , how did you both manage to run yolo_v3-tiny.launch where there isn't any launch file of that name? The closest would be just yolo_v3. Is there a way to convert it to tiny? Or am I missing something?

P.S. I just started learning ROS, any help would be greatly appreciated!

[ilyasmg]

@Buttosaii When I used it, there was a tiny launch file in darknet_ros, now there isn't so you should look into fixing it yourself as I don't mantain it anymore.
You're welcome to do a PR if you manage to fix it