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When i try to run Cmake with:

cmake .. -DCMAKE_INSTALL_PREFIX=/opt/ros/fuerte -DSETUPTOOLS_DEB_LAYOUT=OFF

it shows a error

-- +++ catkin -- Could NOT find PY_em (missing: PY_EM) CMake Error at catkin/cmake/empy.cmake:29 (message): Unable to find either executable 'empy' or Python module 'em'... try installing package 'python-empy' Call Stack (most recent call first): catkin/cmake/all.cmake:52 (include) catkin/CMakeLists.txt:12 (include) Anyone can help me to fix it? I am using Mac OS X 10.7.3


Originally posted by Haojun Guan on ROS Answers with karma: 33 on 2012-04-24

Post score: 3


Original comments

Comment by Haojun Guan on 2012-04-25:
I am sure that i follow the instructions well, and i have install the empy package.

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3 Answers 3

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Try these instuctions, I think they are more up to date. I followed them and have gotten pretty far in the installation. Make sure your python path is correct too.

I am getting stuck with PCL (compiling pcl_ros actually). I have also forked rosdistro and am trying to get the homebrew stuff working correctly for pcl, openni, and ps-engine ... but still having issues.


Originally posted by Kevin with karma: 2962 on 2012-04-25

This answer was ACCEPTED on the original site

Post score: 1

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Look at the error message in detail: ... Unable to find either executable 'empy' or Python module 'em'... try installing package 'python-empy' ...

Did you follow the installation instructions?

You should also be able to run "pip install empy".


Originally posted by AHornung with karma: 5904 on 2012-04-24

This answer was NOT ACCEPTED on the original site

Post score: 4

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I came across this error when trying to install Groovy on osx 10.7.5 (lion). It turns out python 2.6 was being used instead of 2.7. So i ran:

cmake .. -DCMAKE_INSTALL_PREFIX=/opt/ros/groovy -DPYTHON_EXECUTABLE=/usr/bin/python2.7 -DSETUPTOOLS_DEB_LAYOUT=OFF

instead. Note the -DPYTHON_EXECUTABLE .


Originally posted by ians with karma: 31 on 2013-01-22

This answer was NOT ACCEPTED on the original site

Post score: 3

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