How to solve 'No such package or directory found in search path: lwr_utils'?

edit

I followed: http://rtt-lwr.readthedocs.io/en/late...

My error:

Deployer [R]> import("rtt_rospack")
 = true                

Deployer [R]> runScript(ros.find("lwr_utils")+"/scripts/utils.ops")
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)] No such package or directory found in search path: lwr_utils. Search path is: /home/sam/isir/lwr_ws/devel/lib/orocos:/home/sam/code/ros_kinetic/devel/lib/orocos:/opt/ros/kinetic/lib/orocos:.
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)] Directories searched include the following: 
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - /home/sam/isir/lwr_ws/devel/lib/orocos/lwr_utils
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - /home/sam/isir/lwr_ws/devel/lib/orocos/gnulinux/lwr_utils
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - /home/sam/code/ros_kinetic/devel/lib/orocos/lwr_utils
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - /home/sam/code/ros_kinetic/devel/lib/orocos/gnulinux/lwr_utils
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - /opt/ros/kinetic/lib/orocos/lwr_utils
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - /opt/ros/kinetic/lib/orocos/gnulinux/lwr_utils
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - ./lwr_utils
24.518 [ ERROR  ][ComponentLoader::importInstalledPackage(package, path_list)]  - ./gnulinux/lwr_utils
24.520 [ ERROR  ][ScriptingService] No such service or plugin: 'ros_helper'
24.521 [ ERROR  ][ScriptingService] /home/sam/isir/lwr_ws/src/rtt_lwr/lwr_utils/scripts/utils.ops :Parse error at line 17: Service or Task "Deployer" has no Peer or Service ros_helper (or Deployer was not found at all).
 = false               

Deployer [R]>

How to solve it?

Thank you~