I have tried to run talker.cpp file, and after running catkin_make and source the source ./devel/setup.bash. while running rosrun beginner_tutorials talker , I got following error.
~/catkin_ws$ rosrun beginner_tutorials talker
[rosrun] Couldn't find executable named talker below /home/meghana/catkin_ws/src/beginner_tutorials
Kindly help me asap, as this is a blocking for me to move forward in my learnings.