Faldict commented on issue #12142: Failed to import MXNet built with TensorRT URL: https://github.com/apache/incubator-mxnet/issues/12142#issuecomment-412477285 @KellenSunderland Thanks for your useful reply! I run `ldd libmxnet.so` and get the following information: ``` linux-vdso.so.1 => (0x00007fffa4d98000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f31c96a5000) libcudart.so.9.0 => /usr/local/cuda-9.0/lib64/libcudart.so.9.0 (0x00007f31c9438000) libcublas.so.9.0 => /usr/local/cuda-9.0/lib64/libcublas.so.9.0 (0x00007f31c5b33000) libcurand.so.9.0 => /usr/local/cuda-9.0/lib64/libcurand.so.9.0 (0x00007f31c1bcf000) libcusolver.so.9.0 => /usr/local/cuda-9.0/lib64/libcusolver.so.9.0 (0x00007f31bcfd4000) libopenblas.so.0 => /usr/lib/libopenblas.so.0 (0x00007f31baf40000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f31bad38000) libprotobuf.so.15 => /usr/local/lib/libprotobuf.so.15 (0x00007f31ba8b0000) libnvonnxparser.so.0 => /usr/local/lib/libnvonnxparser.so.0 (0x00007f31ba591000) libnvonnxparser_runtime.so.0 => /usr/local/lib/libnvonnxparser_runtime.so.0 (0x00007f31ba2dc000) libnvinfer.so.4 => /usr/lib/x86_64-linux-gnu/libnvinfer.so.4 (0x00007f31b45b4000) libnvinfer_plugin.so.4 => /usr/lib/x86_64-linux-gnu/libnvinfer_plugin.so.4 (0x00007f31b40ed000) liblapack.so.3 => /usr/lib/liblapack.so.3 (0x00007f31b390a000) libcudnn.so.7 => /usr/local/cuda-9.0/lib64/libcudnn.so.7 (0x00007f31a2403000) libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f31a2081000) libomp.so.5 => /usr/lib/x86_64-linux-gnu/libomp.so.5 (0x00007f31a1db5000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f31a1b9f000) libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f31a1982000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f31a15b8000) /lib64/ld-linux-x86-64.so.2 (0x00007f31ccce9000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f31a13b4000) libgfortran.so.3 => /usr/lib/x86_64-linux-gnu/libgfortran.so.3 (0x00007f31a1089000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f31a0e6f000) libquadmath.so.0 => /usr/lib/x86_64-linux-gnu/libquadmath.so.0 (0x00007f31a0c30000) ``` In fact, I have built `protobuf`, `onnx` and `onnx-tensorrt` from source separately and add them to the LD_LIBRARY_PATH. Currently I doubt this problem is because of the compatibility of different `protobuf` versions. Run `ldconfig -p | grep -i protobuf`: ``` libprotobuf.so.15 (libc6,x86-64) => /usr/local/lib/libprotobuf.so.15 libprotobuf.so.9 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libprotobuf.so.9 libprotobuf.so (libc6,x86-64) => /usr/local/lib/libprotobuf.so libprotobuf.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libprotobuf.so libprotobuf-lite.so.15 (libc6,x86-64) => /usr/local/lib/libprotobuf-lite.so.15 libprotobuf-lite.so.9 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libprotobuf-lite.so.9 libprotobuf-lite.so (libc6,x86-64) => /usr/local/lib/libprotobuf-lite.so libprotobuf-lite.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libprotobuf-lite.so libmirprotobuf.so.3 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libmirprotobuf.so.3 ``` `libprotobuf.so.9` is the default version of Ubuntu 16.04, while `libprotobuf.so.15` is installed after building protobuf 3.5.1. Do you have any further ideas?
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