I installed ros kinetic and uwsim in my Ubuntu 16.04.3 LTS.
As the tutorials in wiki, I run roscore in a terminal, and run rosrun uwsim uwsim in another terminal to run UWSim.
The first time I run it just after installation finished, everything is okay.
However, when I closed the window and run it again,
it returned uwsim: package not found.
Are there any necessary steps I left out? Or any other possible questions?
Great appreciation if anyone can help.
This question is a bit old but I just had the same issue.
In the second terminal where you run rosrun uwsim uwsim, you need to source the uwsim setup.bash file.
It should be located at: yourworkspace/devel_isolated/uwsim/setup.bash
source /.../yourworkspace/devel_isolated/uwsim/setup.bash
If you want to avoid typing this all the time you can add the line to your ~/.bashrc file.