rtt-exercise building error

[roboticsai]

I am using ros kinetic in ubuntu 16.04. My first error is:

[Traceback (most recent call last):
File "/opt/ros/kinetic/share/ros/core/rosbuild/bin/check_same_directories.py", line 46, in
raise Exception
Exception

CMake Error at /opt/ros/kinetic/share/ros/core/rosbuild/private.cmake:102 (message):

[rosbuild] rospack found package "controller-1" at "", but the current
directory is "/home/robot/rtt-exercises-2.7.0/controller-1". You should
double-check your ROS_PACKAGE_PATH to ensure that packages are found in the
correct precedence order.
Call Stack (most recent call first):
/opt/ros/kinetic/share/ros/core/rosbuild/public.cmake:177 (_rosbuild_check_package_location)
CMakeLists.txt:24 (rosbuild_init)

-- Configuring incomplete, errors occurred!
See also "/home/robot/rtt-exercises-2.7.0/controller-1/build/CMakeFiles/CMakeOutput.log".](url)

So when i enter command " export ROS_PACKAGE_PATH=${ROS_PACKAGE_PATH}:~/rtt-example/rtt_examples-rtt-2.0-examples/rtt-exercises/controller-1 " than i'm getting below error:

[Failed to invoke /opt/ros/kinetic/bin/rospack deps-manifests controller-1
[rospack] Error: package 'controller-1' depends on non-existent package 'rtt' and rosdep claims that it is not a system dependency. Check the ROS_PACKAGE_PATH or try calling 'rosdep update'

CMake Error at /opt/ros/kinetic/share/ros/core/rosbuild/public.cmake:129 (message):

Failed to invoke rospack to get compile flags for package 'controller-1'.

Look above for errors from rospack itself. Aborting. Please fix the
broken dependency!

Call Stack (most recent call first):
/opt/ros/kinetic/share/ros/core/rosbuild/public.cmake:207 (rosbuild_invoke_rospack)
CMakeLists.txt:24 (rosbuild_init)

-- Configuring incomplete, errors occurred!
See also "/home/robot/rtt-exercises-2.7.0/controller-1/build/CMakeFiles/CMakeOutput.log"](url)

I have already installed the rtt-ros-integration package and orocos-toolchain package from source. And when i enter command " source ~/ws/underlay_isolated/installd_isolated/setup.sh " it again repeates the first error. So how should i solve this error. I was practicing the rtt-example package tutorial to learn orocos basics. This package is also avialabe in [here:] ( https://github.com/orocos-toolchain/r... )