Cannot Find Symbol when importing Cloudprocpy

[JulianYG]

Hi,

When I add the command line option to build cloudprocpy as well, it builds the cloudprocpy, but when I import the library from python, I got following error:

File "", line 1, in
ImportError: /home/cvgl_ros/trajopt/build/lib/cloudprocpy.so: undefined symbol: _ZN9cloudproc12medianFilterIN3pcl8PointXYZEEENS1_10PointCloudIT_E3PtrENS5_8ConstPtrEif

I'm not sure which other lib.so file it is looking for that has wrong version or something. Any one has idea on this? Thanks!

[EdsterG]

I haven't compiled with cloudprocpy however it's hard to diagnose the problem with so little information. What system are you compiling on? What version of python are you using? Can you copy/paste the output from cmake?

[JulianYG]

I'm using ubuntu 14.04, and python 2.7.6. I tried to run cmake with BUILD_CLOUDPROC option on, and after that the make was successful. I then added the trajopt/build/lib and trajopt/ into .bashrc, but when I import that line I got the error. The output from cmake is:

cmake .. -DBUILD_CLOUDPROC=ON-- Boost version: 1.54.0

-- Found the following Boost libraries:
-- system
-- python
-- thread
-- program_options
adding test with path /home/cvgl_ros/installed_libraries/trajopt/python_examples/arm_to_joint_target.py
python exc /home/cvgl_ros/installed_libraries/anaconda2/bin/python
adding test with path /home/cvgl_ros/installed_libraries/trajopt/python_examples/arm_to_cart_target.py
python exc /home/cvgl_ros/installed_libraries/anaconda2/bin/python
adding test with path /home/cvgl_ros/installed_libraries/trajopt/python_examples/fullbody_plan.py
python exc /home/cvgl_ros/installed_libraries/anaconda2/bin/python
adding test with path /home/cvgl_ros/installed_libraries/trajopt/python_examples/position_base.py
python exc /home/cvgl_ros/installed_libraries/anaconda2/bin/python
adding test with path /home/cvgl_ros/installed_libraries/trajopt/python_examples/this_side_up.py
python exc /home/cvgl_ros/installed_libraries/anaconda2/bin/python
-- Could NOT find GUROBI (missing: GUROBI_LIBRARY GUROBI_CXX_LIBRARY GUROBI_INCLUDE_DIR)
Gurobi not found. If you want to use Gurobi, set the GUROBI_HOME variable
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython2.7.so (found suitable version "2.7.6", minimum required is "2")
-- Boost version: 1.54.0
-- Found the following Boost libraries:
-- python
-- Boost version: 1.54.0
-- Found the following Boost libraries:
-- system
-- filesystem
-- thread
-- date_time
-- iostreams
-- serialization
-- checking for module 'openni-dev'
-- package 'openni-dev' not found
-- checking for module 'openni-dev'
-- package 'openni-dev' not found
-- checking for module 'openni-dev'
-- package 'openni-dev' not found
-- looking for PCL_COMMON
-- looking for PCL_OCTREE
-- looking for PCL_IO
-- looking for PCL_KDTREE
-- looking for PCL_SEARCH
-- looking for PCL_SAMPLE_CONSENSUS
-- looking for PCL_FILTERS
-- looking for PCL_FEATURES
-- looking for PCL_KEYPOINTS
-- looking for PCL_GEOMETRY
-- looking for PCL_SEGMENTATION
-- looking for PCL_VISUALIZATION
-- looking for PCL_OUTOFCORE
-- looking for PCL_REGISTRATION
-- looking for PCL_RECOGNITION
-- looking for PCL_SURFACE
-- looking for PCL_PEOPLE
-- looking for PCL_TRACKING
-- looking for PCL_APPS
-- Found PythonLibs: /usr/lib/x86_64-linux-gnu/libpython2.7.so (Required is at least version "2")
-- Boost version: 1.54.0
-- Found the following Boost libraries:
-- python
-- Configuring done
-- Generating done
-- Build files have been written to: /home/cvgl_ros/installed_libraries/trajopt/build

Thanks!

[EdsterG]

Do you have PCL installed? If so what version is installed?

[JulianYG]

We are using PCL 1.7. Thanks!

[mzwang828]

Hi Julian,

Did you solve this problem by any chance? I'm having the exactly same issue when I'm importing the cloudprocpy library. Thanks!

[JulianYG]

@mzwang828 I haven't solved it. Let me know if you do!

[mzwang828]

@JulianYG Yes, I found a solution. Please check this repo: https://github.com/erictzeng/trajopt
You can either use this version or just replace the original cloudproc.cpp and cloudproc.hpp files. I replaced the two files and now it works.

[JulianYG]

@mzwang828 Thank you so much!