Error making schunk_robots package - ivcon:command not found

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I am attempting to make a package called schunk_robots. However, I get the following error:

{-------------------------------------------------------------------------------
  -- Detecting CXX compiler ABI info
  -- Detecting CXX compiler ABI info - done
  -- Found PythonInterp: /usr/bin/python (found version "2.7.3")
  [rosbuild] Building package schunk_description
  [rosbuild] Cached build flags older than manifests; calling rospack to get flags
  [rosbuild] Including /opt/ros/fuerte/share/roscpp/rosbuild/roscpp.cmake
  [rosbuild] Including /opt/ros/fuerte/share/rospy/rosbuild/rospy.cmake
  [rosbuild] Including /opt/ros/fuerte/share/roslisp/rosbuild/roslisp.cmake
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build
  cd build && make -j4 -l4
  make[1]: Entering directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
  make[2]: Entering directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
  make[3]: Entering directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
  Scanning dependencies of target media_files
  make[3]: Leaving directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
  make[3]: Entering directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
  [  1%] [  2%] [  3%] Generating ../meshes/sdh/convex
  Generating ../meshes/sdh/iv
  [  4%] Generating ../meshes/powerball/convex
  [  5%] Generating ../meshes/powerball/iv
  Generating ../meshes/lwa/convex
  [  6%] Generating ../meshes/lwa/iv
  [  6%] [  7%] [  8%] Generating ../meshes/sdh/iv/finger_tip.iv
  Generating ../meshes/sdh/convex/finger_tip.obj
  make[3]: ivcon: Command not found
  make[3]: *** [../meshes/sdh/iv/finger_tip.iv] Error 127
  make[3]: *** Waiting for unfinished jobs....
  Generating ../meshes/sdh/convex/finger.obj
  make[3]: ivcon: Command not found
  make[3]: ivcon: Command not found
  make[3]: *** [../meshes/sdh/convex/finger_tip.obj] Error 127
  make[3]: *** [../meshes/sdh/convex/finger.obj] Error 127
  make[3]: Leaving directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
  make[2]: *** [CMakeFiles/media_files.dir/all] Error 2
  make[2]: Leaving directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
  make[1]: *** [all] Error 2
  make[1]: Leaving directory `/home/karsh/powerball/controllerROS/allStuff/schunk_modular_robotics/schunk_description/build'
-------------------------------------------------------------------------------}

Does anyone know what this ivcon command is and why it's missing? Thanks a lot for your help!

PS: I am using ROS Fuerte on Ubuntu 12.04