Hi, I use Ubuntu 11.04; ROS-Electric

I am getting the below error when i compile the perceptionpclelectric_unstable. Basically i need pcl 1.6 in ros

[rosmake-1] Starting >>> pcl_ros [ make ]                                                                                    
[ rosmake ] All 31 linescl_ros: 0.6 sec ]                                                       [ 1 Active 101/102 Complete ]
{-------------------------------------------------------------------------------
  mkdir -p bin
  cd build && cmake -Wdev -DCMAKE_TOOLCHAIN_FILE=`rospack find rosbuild`/rostoolchain.cmake  ..
  [rosbuild] Building package pcl_ros
  [rosbuild] Cached build flags older than manifests; calling rospack to get flags
  Failed to invoke /opt/ros/electric/ros/bin/rospack cflags-only-I;--deps-only pcl_ros
  CMake Error at /usr/local/lib/vtk-5.8/VTKTargets.cmake:16 (ADD_LIBRARY):
    Command add_library() is not scriptable
  Call Stack (most recent call first):
    /usr/local/lib/vtk-5.8/VTKConfig.cmake:231 (INCLUDE)
    /usr/share/cmake-2.8/Modules/FindVTK.cmake:73 (FIND_PACKAGE)
    /workspace/karthik/RRC/ros_workspace/perception_pcl_electric_unstable/pcl/vtk_include.cmake:1 (find_package)


  [rospack] warning: got non-zero exit status from executing backquote expression "ret="-I/workspace/karthik/RRC/ros_workspace/perception_pcl_electric_unstable/pcl/include/pcl-1.6/ -I`cmake -P /workspace/karthik/RRC/ros_workspace/perception_pcl_electric_unstable/pcl/vtk_include.cmake`" && echo $ret" in [/workspace/karthik/RRC/ros_workspace/perception_pcl_electric_unstable/pcl/manifest.xml]
  [rospack] error in backquote expansion for pcl_ros


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


    Failed to invoke rospack to get compile flags for package 'pcl_ros'.  Look
    above for errors from rospack itself.  Aborting.  Please fix the broken
    dependency!

  Call Stack (most recent call first):
    /opt/ros/electric/ros/core/rosbuild/public.cmake:230 (rosbuild_invoke_rospack)
    CMakeLists.txt:4 (rosbuild_init)


  -- Configuring incomplete, errors occurred!
-------------------------------------------------------------------------------}
[ rosmake ] Output from build of package pcl_ros written to:
[ rosmake ]    /home/karthik/.ros/rosmake/rosmake_output-20120706-133230/pcl_ros/build_output.log
[rosmake-1] Finished <<< pcl_ros [FAIL] [ 0.62 seconds ]                                                                     
[ rosmake ] Halting due to failure in package pcl_ros. 
[ rosmake ] Waiting for other threads to complete.                   
[ rosmake ] Results:                                                                                                         
[ rosmake ] Built 102 packages with 1 failures.                                                                              
[ rosmake ] Summary output to directory                                                                                      
[ rosmake ] /home/karthik/.ros/rosmake/rosmake_output-20120706-133230  

Any help here is appreciated!!!

Thanks, Karthik