Import Error: Ransac Voting Layer - undefined symbo

[Lynne-Zheng-Linfang]

Hi, I followed the instructions to do the training, however, the code terminated with the following error:

Exception has occurred: ImportError
/home/linfang/Documents/Code/HybridPose/lib/ransac_voting_gpu_layer/ransac_voting.so: undefined symbol: _ZN6caffe26detail37_typeMetaDataInstance_preallocated_32E
  File "/home/linfang/Documents/Code/HybridPose/lib/ransac_voting_gpu_layer/ransac_voting_gpu.py", line 3, in <module>
    import lib.ransac_voting_gpu_layer.ransac_voting as ransac_voting
  File "/home/linfang/Documents/Code/HybridPose/trainers/coretrainer.py", line 10, in <module>
    from lib.ransac_voting_gpu_layer.ransac_voting_gpu import ransac_voting_layer_v3
  File "/home/linfang/Documents/Code/HybridPose/src/train_core.py", line 12, in <module>
    from trainers.coretrainer import CoreTrainer

When I was compiling the Ransac Voting Layer, there was a warning about the torch C++ extension. I tried to add #include <torch/extrension.h> into ransac_voting.cpp, but it didn't work. It seems that the error is related to the version of Pytorch, could you please share the torch version?

running build_ext
building 'ransac_voting' extension
gcc -pthread -B /home/linfang/anaconda3/envs/hybridpose/compiler_compat -Wl,--sysroot=/ -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include/torch/csrc/api/include -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include/TH -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include/THC -I/home/linfang/anaconda3/envs/hybridpose/include/python3.7m -c ./src/ransac_voting.cpp -o build/temp.linux-x86_64-3.7/./src/ransac_voting.o -DTORCH_API_INCLUDE_EXTENSION_H -DTORCH_EXTENSION_NAME=ransac_voting -D_GLIBCXX_USE_CXX11_ABI=0 -std=c++11
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
In file included from ./src/ransac_voting.cpp:1:0:
/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include/torch/csrc/api/include/torch/torch.h:11:4: warning: #warning "Including torch/torch.h for C++ extensions is deprecated. Please include torch/extension.h" [-Wcpp]
 #  warning "Including torch/torch.h for C++ extensions is deprecated. Please include torch/extension.h"
    ^~~~~~~
/usr/bin/nvcc -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include/torch/csrc/api/include -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include/TH -I/home/linfang/anaconda3/envs/hybridpose/lib/python3.7/site-packages/torch/include/THC -I/home/linfang/anaconda3/envs/hybridpose/include/python3.7m -c ./src/ransac_voting_kernel.cu -o build/temp.linux-x86_64-3.7/./src/ransac_voting_kernel.o -D__CUDA_NO_HALF_OPERATORS__ -D__CUDA_NO_HALF_CONVERSIONS__ -D__CUDA_NO_HALF2_OPERATORS__ --expt-relaxed-constexpr --compiler-options '-fPIC' -DTORCH_API_INCLUDE_EXTENSION_H -DTORCH_EXTENSION_NAME=ransac_voting -D_GLIBCXX_USE_CXX11_ABI=0 -std=c++11
g++ -pthread -shared -B /home/linfang/anaconda3/envs/hybridpose/compiler_compat -L/home/linfang/anaconda3/envs/hybridpose/lib -Wl,-rpath=/home/linfang/anaconda3/envs/hybridpose/lib -Wl,--no-as-needed -Wl,--sysroot=/ build/temp.linux-x86_64-3.7/./src/ransac_voting.o build/temp.linux-x86_64-3.7/./src/ransac_voting_kernel.o -L/usr/lib -lcudart -o build/lib.linux-x86_64-3.7/ransac_voting.cpython-37m-x86_64-linux-gnu.so
copying build/lib.linux-x86_64-3.7/ransac_voting.cpython-37m-x86_64-linux-gnu.so -> 

[chensong1995]

Hello Linfang,

This error is unexpected to me. After some online searches, I suspect it has something to do with your CUDA version. My workstation has CUDA 10.1, and I am also able to compile the code on our department server which runs CUDA 10.0.

[Lynne-Zheng-Linfang]

Hello Linfang,

This error is unexpected to me. After some online searches, I suspect it has something to do with your CUDA version. My workstation has CUDA 10.1, and I am also able to compile the code on our department server which runs CUDA 10.0.

Hi, my CUDA version is 10.0. It is the problem with my virtual environment setting. I already solved it. Thank you!

[chensong1995]

I'm glad to hear it! It would be helpful if you can post your steps to resolve the problem here. Other people are going to be benefited from that.

[WHHHHY]

林芳你好，
这个错误出乎我的意料。网上查了一下，怀疑和你的CUDA版本有关系。我的工作站有 CUDA 10.1，我也可以在运行 CUDA 10.0 的部门服务器上编译代码。

你好，我的CUDA版本是10.0。这是我的虚拟环境设置的问题。我已经解决了。谢谢你！
Hello,

Hello Linfang,
This error is unexpected to me. After some online searches, I suspect it has something to do with your CUDA version. My workstation has CUDA 10.1, and I am also able to compile the code on our department server which runs CUDA 10.0.

Hi, my CUDA version is 10.0. It is the problem with my virtual environment setting. I already solved it. Thank you!

Hello，Linfang,
I encountered the same error as you,but，it seems like didn't work when I changed the version of CUDA,could you tell me how to fix this error,thank you !