error during pcl_ros

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Hi ,

I downloaded pcl and perception_pcl from pointclouds.org and did rosdep without any errors..

when I rosmake pcl_ros, its resulting the errors below.

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/fuerte/bin/rospack cflags-only-I;--deps-only pcl_ros CMake Error at /usr/lib/vtk-5.8/VTKTargets.cmake:16 (ADD_EXECUTABLE): Command add_executable() is not scriptable Call Stack (most recent call first): /usr/lib/vtk-5.8/VTKConfig.cmake:231 (INCLUDE) /usr/share/cmake-2.8/Modules/FindVTK.cmake:73 (FIND_PACKAGE) /home/sai/fuerte_workspace/pcl17/pcl/vtk_include.cmake:1 (find_package)

CMake Error at /opt/ros/fuerte/share/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/fuerte/share/ros/core/rosbuild/public.cmake:227 (rosbuild_invoke_rospack) CMakeLists.txt:4 (rosbuild_init)

-- Configuring incomplete, errors occurred!

Thanks