I started with ROS 2.0 recently. After going through the initial basic steps, I thought of writing some test package. However when I add my workspace to eclipse (oxygen), it would report 7 build errors, ‘rtpsgen’ is missing required library: ‘lib/antlr-2.7.7.jar’. I tried installing the latest antlr library 4.5 however the error still persists. However it did not create any issues while creating an ament package or a normal build.
I would like to what sort of error is this?