Libopenblas.so.0 not found

Autonomous Machines Jetson & Embedded Systems Jetson Orin Nano
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from torch._C import * # noqa: F403
ImportError: libopenblas.so.0: cannot open shared object file: No such file or directory

This is the error I encountered while running the pytorch in Jetson ORIN Nano.
Can you please suggest a fix for it?

I have tried installing libopenblas package as suggested in one of the forums, but the error still exists.

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moving this topic to Jetson Orin Nano forum

Hi @amjoejoshi0098, what does ldd /usr/local/lib/python3.8/dist-packages/torch/_C.cpython-38-aarch64-linux-gnu.so show for you?

ldd /usr/local/lib/python3.8/dist-packages/torch/_C.cpython-38-aarch64-linux-gnu.so
        linux-vdso.so.1 (0x0000ffff842c1000)
        libtorch_python.so => /usr/local/lib/python3.8/dist-packages/torch/lib/libtorch_python.so (0x0000ffff836fc000)
        libshm.so => /usr/local/lib/python3.8/dist-packages/torch/lib/libshm.so (0x0000ffff836e4000)
        libtorch.so => /usr/local/lib/python3.8/dist-packages/torch/lib/libtorch.so (0x0000ffff836d2000)
        libnvToolsExt.so.1 => /usr/local/cuda-11.4/lib64/libnvToolsExt.so.1 (0x0000ffff836b6000)
        libtorch_cpu.so => /usr/local/lib/python3.8/dist-packages/torch/lib/libtorch_cpu.so (0x0000ffff7ef64000)
        libtorch_cuda.so => /usr/local/lib/python3.8/dist-packages/torch/lib/libtorch_cuda.so (0x0000ffff6fb64000)
        libc10_cuda.so => /usr/local/lib/python3.8/dist-packages/torch/lib/libc10_cuda.so (0x0000ffff6fb05000)
        libcudart.so.11.0 => /usr/local/cuda-11.4/lib64/libcudart.so.11.0 (0x0000ffff6fa49000)
        libcudnn.so.8 => /lib/aarch64-linux-gnu/libcudnn.so.8 (0x0000ffff6f9ee000)
        libc10.so => /usr/local/lib/python3.8/dist-packages/torch/lib/libc10.so (0x0000ffff6f977000)
        libstdc++.so.6 => /lib/aarch64-linux-gnu/libstdc++.so.6 (0x0000ffff6f792000)
        libgcc_s.so.1 => /lib/aarch64-linux-gnu/libgcc_s.so.1 (0x0000ffff6f76e000)
        libpthread.so.0 => /lib/aarch64-linux-gnu/libpthread.so.0 (0x0000ffff6f73d000)
        libc.so.6 => /lib/aarch64-linux-gnu/libc.so.6 (0x0000ffff6f5ca000)
        /lib/ld-linux-aarch64.so.1 (0x0000ffff84291000)
        librt.so.1 => /lib/aarch64-linux-gnu/librt.so.1 (0x0000ffff6f5b2000)
        libdl.so.2 => /lib/aarch64-linux-gnu/libdl.so.2 (0x0000ffff6f59e000)
        libm.so.6 => /lib/aarch64-linux-gnu/libm.so.6 (0x0000ffff6f4f3000)
        libgomp.so.1 => /lib/aarch64-linux-gnu/libgomp.so.1 (0x0000ffff6f4a5000)
        libnuma.so.1 => /lib/aarch64-linux-gnu/libnuma.so.1 (0x0000ffff6f486000)
        libopenblas.so.0 => /lib/aarch64-linux-gnu/libopenblas.so.0 (0x0000ffff6e5ee000)
        libcusparse.so.11 => /usr/local/cuda-11.4/lib64/libcusparse.so.11 (0x0000ffff60947000)
        libcurand.so.10 => /usr/local/cuda-11.4/lib64/libcurand.so.10 (0x0000ffff5b89d000)
        libcusolver.so.11 => /usr/local/cuda-11.4/lib64/libcusolver.so.11 (0x0000ffff4e73f000)
        libcufft.so.10 => /usr/local/cuda-11.4/lib64/libcufft.so.10 (0x0000ffff437d7000)
        libcublas.so.11 => /usr/local/cuda-11.4/lib64/libcublas.so.11 (0x0000ffff396fe000)
        libgfortran.so.5 => /lib/aarch64-linux-gnu/libgfortran.so.5 (0x0000ffff39583000)
        libcublasLt.so.11 => /usr/local/cuda-11.4/lib64/libcublasLt.so.11 (0x0000ffff21fe2000)

And what does the following show for you?

$ ls -ll /lib/aarch64-linux-gnu/libopenblas*

lrwxrwxrwx 1 root root 49 Mar  2 09:07 /lib/aarch64-linux-gnu/libopenblas.a -> /etc/alternatives/libopenblas.a-aarch64-linux-gnu
lrwxrwxrwx 1 root root 50 Mar  2 09:07 /lib/aarch64-linux-gnu/libopenblas.so -> /etc/alternatives/libopenblas.so-aarch64-linux-gnu
lrwxrwxrwx 1 root root 52 Mar  2 09:07 /lib/aarch64-linux-gnu/libopenblas.so.0 -> /etc/alternatives/libopenblas.so.0-aarch64-linux-gnu

$ ls -ll /etc/alternatives/libopenblas*

lrwxrwxrwx 1 root root 57 Mar  2 09:07 /etc/alternatives/libopenblas.a-aarch64-linux-gnu -> /usr/lib/aarch64-linux-gnu/openblas-pthread/libopenblas.a
lrwxrwxrwx 1 root root 60 Mar  2 09:07 /etc/alternatives/libopenblas.so.0-aarch64-linux-gnu -> /usr/lib/aarch64-linux-gnu/openblas-pthread/libopenblas.so.0
lrwxrwxrwx 1 root root 58 Mar  2 09:07 /etc/alternatives/libopenblas.so-aarch64-linux-gnu -> /usr/lib/aarch64-linux-gnu/openblas-pthread/libopenblas.so

$ ls -ll /usr/lib/aarch64-linux-gnu/openblas-pthread/

total 65028
drwxr-xr-x 3 root root     4096 Mar  2 09:07 cmake
lrwxrwxrwx 1 root root       13 Jun  2  2020 libblas.a -> libopenblas.a
lrwxrwxrwx 1 root root       12 Jun  2  2020 libblas.so -> libblas.so.3
-rw-r--r-- 1 root root  9244080 Jun  2  2020 libblas.so.3
lrwxrwxrwx 1 root root       13 Jun  2  2020 liblapack.a -> libopenblas.a
lrwxrwxrwx 1 root root       14 Jun  2  2020 liblapack.so -> liblapack.so.3
-rw-r--r-- 1 root root 14496456 Jun  2  2020 liblapack.so.3
lrwxrwxrwx 1 root root       21 Jun  2  2020 libopenblas.a -> libopenblasp-r0.3.8.a
-rw-r--r-- 1 root root 27617180 Jun  2  2020 libopenblasp-r0.3.8.a
-rw-r--r-- 1 root root 15213840 Jun  2  2020 libopenblasp-r0.3.8.so
lrwxrwxrwx 1 root root       22 Jun  2  2020 libopenblas.so -> libopenblasp-r0.3.8.so
lrwxrwxrwx 1 root root       22 Jun  2  2020 libopenblas.so.0 -> libopenblasp-r0.3.8.so
drwxr-xr-x 2 root root     4096 Mar  2 09:07 pkgconfig

Also, what version of JetPack-L4T are you running? You can check this with cat /etc/nv_tegra/release

BTW, if it’s faster for you, you can try running the l4t-pytorch container which should have everything already pre-installed inside it.

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Thank you for your timely reply @dusty_nv.
Here are some screen shots attached below:
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I am running Jetpack5.1

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It’s saying it can find any of the files. What does pip3 show torch list as the install location for PyTorch? Track it down, run the ldd command that I did on it’s torch/_C.cpython-38-aarch64-linux-gnu.so file, and that will tell you which dependencies are missing.

Or if you are unfamiliar with doing these kind of things yourself, you can try the l4t-pytorch container that I linked to above.

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