On 26.02.2019 19:26, Maurizio Cimadamore wrote: > That's odd! We'll give this a try and see if we can reproduce. I'm using official libfftw32 Windows build: ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip I'm using minimal Visual Studio Build Tools 2017 with Win SDK 10.1.17763.132 -- // Black Lion AKA Lev Serebryakov