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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[BUG]: `libmathdx.so` not found, even with `nvidia-libmathdx-cu13` installed.","articleBody":"### Is this a duplicate?\n\n- [x] I confirmed there appear to be no [duplicate issues](https://github.com/NVIDIA/nvmath-python/issues) for this bug and that I agree to the [Code of Conduct](CODE_OF_CONDUCT.md)\n\n### Type of Bug\n\nRuntime Error\n\n### Component\n\ndevice\n\n### Describe the bug\n\n`libmathdx.so` cannot be located.\n\n### How to Reproduce\n\nAttempting to run the example `examples/device/cufftdx_convolution_performance.py` fails.\n\nCommand:\n`uv run --with nvidia-libmathdx-cu13 --with ./nvmath-python[cu13-dx] --with cupy python ./nvmath-python/examples/device/cufftdx_convolution_performance.py`\n\nAn error is produced:\n`cuda.pathfinder._dynamic_libs.load_dl_common.DynamicLibNotFoundError: Failure finding \"libmathdx.so\": No such file: libmathdx.so*, No such file: libmathdx.so*, No such file: libmathdx.so*`\n\n### Expected behavior\n\n`cuda.pathfinder` should find `libmathdx.so`.\n\n### Operating System\n\n_No response_\n\n### nvidia-smi output\n\n_No response_","author":{"url":"https://github.com/murdock-grewar","@type":"Person","name":"murdock-grewar"},"datePublished":"2026-05-07T12:37:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/62/nvmath-python/issues/62"}