Re: [ros-users] roslaunch gazebo_worlds empty_world.launch

>     <env name="GAZEBO_RESOURCE_PATH" value="$(find gazebo_worlds):$(find 
> gazebo)/gazebo/share/gazebo" />

>     Hi all,

>     Do I need to install pr2_gazebo to use the command:
>     roslaunch gazebo_worlds empty_world.launch ? Even if I won't use the PR2
>     robot?

>     I just installed gazebo_tools and gazebo_worlds but I get an error when
>     I try to start empty_world. (see below)

>     Cheers,

>     Ugo

>     Traceback (most recent call last):
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/__init__.py",
>     line 198, in main
>         p.start()
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/parent.py",
>     line 217, in start
>         self._start_infrastructure()
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/parent.py",
>     line 180, in _start_infrastructure
>         self._load_config()
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/parent.py",
>     line 106, in _load_config
>         self.config =
>     roslaunch.config.load_config_default(self.roslaunch_files, self.port)
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/config.py",
>     line 371, in load_config_default
>         loader.load(f, config, verbose=verbose)
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/xmlloader.py",
>     line 662, in load
>         self._load_launch(launch, ros_config, is_core=core,
>     filename=filename, verbose=verbose)
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/xmlloader.py",
>     line 637, in _load_launch
>         self._recurse_load(ros_config, launch.childNodes,
>     self.root_context, None, is_core, verbose)
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/xmlloader.py",
>     line 590, in _recurse_load
>         n = self._node_tag(tag, context.child(''), ros_config,
>     default_machine, verbose=verbose)
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/xmlloader.py",
>     line 359, in _node_tag
>         self._env_tag(t, context, ros_config)
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/xmlloader.py",
>     line 502, in _env_tag
>         self.load_env(context, ros_config, *self.reqd_attrs(tag, context,
>     XmlLoader.ENV_ATTRS))
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/xmlloader.py",
>     line 175, in reqd_attrs
>         return [self.resolve_args(tag.attributes[a].value, context) for a
>     in attrs]
>       File "/home/hand/ros/ros/tools/roslaunch/src/roslaunch/xmlloader.py",
>     line 146, in resolve_args
>         return roslib.substitution_args.resolve_args(args,
>     context=context.resolve_dict, resolve_anon=self.resolve_anon)
>       File
>     "/home/hand/ros/ros/core/roslib/src/roslib/substitution_args.py", line
>     105, in resolve_args
>         resolved = resolved[0:idx-len(arg)] +
>     roslib.packages.get_pkg_dir(args[0]) + resolved[idx:]
>       File "/home/hand/ros/ros/core/roslib/src/roslib/packages.py", line
>     213, in get_pkg_dir
>         raise InvalidROSPkgException("Cannot locate installation of package
>     %s: %s. ROS_ROOT[%s] ROS_PACKAGE_PATH[%s]"%(package, rperr.strip(),
>     ros_root, ros_package_path))
>     InvalidROSPkgException: Cannot locate installation of package
>     pr2_gazebo_plugins: [rospack] couldn't find package
>     [pr2_gazebo_plugins]. ROS_ROOT[/home/hand/ros/ros]
>     ROS_PACKAGE_PATH[/home/hand/ros/stacks:/home/hand/Projects/Projects/ROS_can_interface/shadowhand]

>     --
>     Ugo Cupcic         |  Shadow Robot Company | ugo@shadowrobot.com
>     <mailto:ugo@shadowrobot.com>
>     Software Engineer      251 Liverpool Road
>     need a Hand?           London  N1 1LX       | +44 20 7700 2487
>     http://www.shadowrobot.com/hand/              @shadowrobot

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