Open webots through terminal can detected ros,while open webots through icons dosen't work

[HuNingHe]

on ubuntu 20.04 ,
roscore first
then open webots by click icons.
then change the controller to ros
then get the error:
/usr/local/webots/projects/default/controllers/ros/ros: error while loading shared libraries: libroscpp.so: cannot open shared object file: No such file or directory.

while open webots by terminal, it works.
why? and how to fix this?

[omichel]

I guess this is because your desktop environment misses some ROS setup. When you install ROS, some stuff is added to your .bashrc or .bash_profile configuration file that will setup some environment variable when a terminal with bash is started. This is not executed when you launch Webots from the desktop. A solution would be to set these environment variables in the .profile file which is executed when the desktop is started. More detail on how to setup environment variable on Ubuntu are provided here: https://help.ubuntu.com/community/EnvironmentVariables. Please let me know if that helps.

[HuNingHe]

No it doesn't work

[HuNingHe]

I will use terminal to setup webots for now