import _c error

[HansolEom]

I followed the install.me process.
But there is an error like the following.

File "tools/train_net.py", line 18, in
from maskrcnn_benchmark.engine.inference import inference
File "/workspace/FreeAnchor/maskrcnn_benchmark/engine/inference.py", line 20, in
from maskrcnn_benchmark.structures.boxlist_ops import boxlist_iou
File "/workspace/FreeAnchor/maskrcnn_benchmark/structures/boxlist_ops.py", line 6, in
from maskrcnn_benchmark.layers import nms as _box_nms
File "/workspace/FreeAnchor/maskrcnn_benchmark/layers/init.py", line 8, in
from .nms import nms
File "/workspace/FreeAnchor/maskrcnn_benchmark/layers/nms.py", line 3, in
from maskrcnn_benchmark import _C
ImportError: /workspace/FreeAnchor/maskrcnn_benchmark/_C.cpython-37m-x86_64-linux-gnu.so: undefined symbol: _ZN2at19UndefinedTensorImpl10_singletonE

Package Version Location

---

backcall 0.1.0
certifi 2019.11.28
cffi 1.13.2
cycler 0.10.0
Cython 0.29.14
decorator 4.4.1
ipython 7.12.0
ipython-genutils 0.2.0
jedi 0.16.0
kiwisolver 1.1.0
maskrcnn-benchmark 0.1 /workspace/FreeAnchor
matplotlib 3.1.3
mkl-fft 1.0.15
mkl-random 1.1.0
mkl-service 2.3.0
numpy 1.18.1
olefile 0.46
parso 0.6.0
pexpect 4.8.0
pickleshare 0.7.5
Pillow 4.1.1
pip 20.0.2
prompt-toolkit 3.0.3
ptyprocess 0.6.0
pycocotools 2.0.0
pycparser 2.19
Pygments 2.5.2
pyparsing 2.4.6
python-dateutil 2.8.1
PyYAML 5.3
setuptools 45.1.0.post20200127
six 1.14.0
torch 1.1.0
torchvision 0.2.1
tqdm 4.42.1
traitlets 4.3.3
wcwidth 0.1.8
wheel 0.34.2
yacs 0.1.6

How do I solve this problem?

[123wk45678]

do you solve it?

[HansolEom]

do you solve it?

I solved this problem.
It was a setup.py problem.

[123wk45678]

what do you do in setup.py?please tell me thanks