On Wed, Jan 12 2022, Marco Atzeri wrote: > On 12.01.2022 12:47, ggl329 wrote: >> Hi Marco, >> I upgraded python39-numpy to 1.22.0-1, and failed to import numpy. >> It seems that mtrand.cpython-39-x86_64-cygwin.dll does not have >> PyInit_mtrand. >> Could you check if numpy can be imported in your environment? >>>> working on it. > In theory I have not changed the build between the two versions > but there was a patch in 1.19.4-1 for similar issue. >> Regards > Marco I have the same problems with the distribution NumPy package, but I can use a locally-compiled NumPy with no patches. It doesn't look like your build has any patches either: https://cygwin.com/cgi-bin2/package-cat.cgi?file=x86_64%2Fpython-numpy-src%2Fpython-numpy-1.22.0-1-src&grep=numpy so that's fun. Out of curiousity, what options are you passing for cpu-baseline and cpu-dispatch? https://numpy.org/devdocs/reference/simd/build-options.html I don't see the newest cygport in the Cygwin package repository.