[ROS Q&A] 084 - Found the following, but they're either not files or not exe

In this video we show how to solve the error "Found the following, but they're either not files or not executable" that happens sometimes when you call "rosrun" to run a ROS Node. This error was reported in the following question:
https://answers.ros.org/question/258154/visualize_velocity_profilepy-not-working-in-teb_local_planner/

Q: When the user tries to run his file called visualize_velocity_profile.py this error happens.

A: This happened because the file doesn't have execute permissions. To give "execute permissions" in this case the user could just run "chmod +x visualize_velocity_profile.py".solve it.