Hi,
From your bitbucket, after cloning the repository of a jackal, when I tried launching unit_outdoor_jackal_world.launch, neither does gazebo shows up nor the model comes.
Similarly, when I’m tried for Summit XL, this thing keeps popping "[N=/summit_xl_robot_control,F=starting-398]: SummitXLControllerClass::starting] and this comes in an infinite loop and it never launches