fferri wrote: ↑25 May 2022, 10:35
The correctness of the call to sim.getObject with a relative path argument depends on where the script is located.
sim.getObject'./front_left_wheel' will work from the robot's script, but not from a script outside the robot hierarchy tree.
From other scripts you can use an absolute partial path, e.g. '/RobotnikSummitXL/front_left_wheel' (which is roughly the same as '/RobotnikSummitXL/*/front_left_wheel') or another path that is valid and not ambiguous.