# Error: ‘PyArray\_Descr’ has no member named ‘elsize’ **URL:** \ **Category:** Uncategorized\ **Created:** [December 3, 2024, 4:22am UTC](https://discuss.pytorch.org/t/error-pyarray-descr-has-no-member-named-elsize/213726 "2024-12-03T04:22:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![tuler](https://discuss.pytorch.org/user_avatar/discuss.pytorch.org/tuler/32/74315_2.png) [@tuler](https://discuss.pytorch.org/u/tuler)\ **Post date:** [December 3, 2024, 4:22am UTC](https://discuss.pytorch.org/t/error-pyarray-descr-has-no-member-named-elsize/213726/1 "2024-12-03T04:22:38Z")
I’m trying to compile a specific version of PyTorch (2.1.2) from source in Linux, but I’m facing the following issue: ```auto [1861/1881] Building CXX object caffe2/torch/CMakeFiles/torch_python.dir/csrc/utils/tensor_numpy.cpp.o FAILED: caffe2/torch/CMakeFiles/torch_python.dir/csrc/utils/tensor_numpy.cpp.o /src/pytorch/torch/csrc/utils/tensor_numpy.cpp: In function ‘at::Tensor torch::utils::tensor_from_cuda_array_interface(PyObject*)’: /src/pytorch/torch/csrc/utils/tensor_numpy.cpp:404:34: error: ‘PyArray_Descr’ has no member named ‘elsize’ 404 | dtype_size_in_bytes = descr->elsize; | ^ ~~~~~ ``` Maybe the cause is an incompatible version of NumPy that is being pulled in. ps: my environment is actually a bit different. It’s a slightly patched PyTorch being built on riscv64 using qemu. But maybe the error is not related. ---
**Author:** ![ptrblck](https://discuss.pytorch.org/user_avatar/discuss.pytorch.org/ptrblck/32/1823_2.png) [@ptrblck](https://discuss.pytorch.org/u/ptrblck)\ **Post date:** [December 3, 2024, 8:37pm UTC](https://discuss.pytorch.org/t/error-pyarray-descr-has-no-member-named-elsize/213726/2 "2024-12-03T20:37:22Z")
Downgrade `numpy` to `<2.0` and try to rebuild PyTorch. ---
**Author:** ![tuler](https://discuss.pytorch.org/user_avatar/discuss.pytorch.org/tuler/32/74315_2.png) [@tuler](https://discuss.pytorch.org/u/tuler)\ **Post date:** [December 5, 2024, 3:39pm UTC](https://discuss.pytorch.org/t/error-pyarray-descr-has-no-member-named-elsize/213726/3 "2024-12-05T15:39:22Z")
That worked. Thanks for the tip.