February 2026 - Ifeffit - millenia.cars.aps.anl.gov

Re: error message when installing Larch on macbookpro M1
by Sebastian Kunze 25 Feb '26

25 Feb '26

Hi Nikita, using conda and pip together in one environment can sometimes lead to issues. I had this problem a lot, and not only with larch. What worked very well for me was using the pixi package manager ( https://urldefense.us/v3/__https://pixi.prefix.dev/latest/__;!!G_uCfscf7eWS… ). You can create one project environment for larch, set larix callable globally and never think about it again. Since then, all larch updates and installs work reliably across my win/lin and m3 devices, so it may also work for you. Best, Sebastian On Wed, 25 Feb 2026 at 15:00, <ifeffit-request(a)millenia.cars.aps.anl.gov> wrote: > Send Ifeffit mailing list submissions to > ifeffit(a)millenia.cars.aps.anl.gov > > To subscribe or unsubscribe via email, send a message with subject or > body 'help' to > ifeffit-request(a)millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-owner(a)millenia.cars.aps.anl.gov > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ifeffit digest..." > > Today's Topics: > > 1. Re: error message when installing Larch on macbookpro M1 > (Matthew Newville) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 24 Feb 2026 16:11:21 +0000 > From: Matthew Newville <newville(a)cars.uchicago.edu> > Subject: [Ifeffit] Re: error message when installing Larch on > macbookpro M1 > To: "ifeffit(a)millenia.cars.aps.anl.gov" > <ifeffit(a)millenia.cars.aps.anl.gov> > Cc: Nikita Vostrov <nik.vostrov(a)gmail.com> > Message-ID: <MN6PR11MB821907E82A5C52338AA4C4E39674A(a)MN6PR11MB8219.nam > prd11.prod.outlook.com> > Content-Type: multipart/alternative; boundary="_000_MN6PR11MB821907 > E82A5C52338AA4C4E39674AMN6PR11MB8219namp_" > > Hi Nikita, > > Sorry for the trouble. I have not been able to reproduce this myself, and > I've seen others successfully install on a Macbook M1 (I am pretty sure the > details of the architecture do not matter) with the PKG installer and > GetLarch.sh script. I have also seen a few other broken installations, > too. The packages that come from the Materials Project (including spglib) > seem to be the most fragile. > > If you reach the point where 'spglib' fails to build, it is almost certain > you have a working conda Python environment that can be fixed in a Terminal > (under Applications->Utilities). I would suggest opening a Terminal window > and run > ~/xraylarch/bin/conda install -c conda-forge spglib pymatgen > > That may take some time, and it may install many more packages. But it > should work. > Then you can run > ~/xraylarch/bin/python -m pip install "xraylarch[larix]" > ~/xraylarch/bin/larch -m > > Again, each of those may take some time. And, at the time, the 'larch -m" > command will print out a lot of useless messages (only on MacOS, and on the > list of things to fix). > > --Matt > > > ________________________________ > From: Nikita Vostrov via Ifeffit <ifeffit(a)millenia.cars.aps.anl.gov> > Sent: Monday, February 23, 2026 11:23 AM > To: ifeffit(a)millenia.cars.aps.anl.gov <ifeffit(a)millenia.cars.aps.anl.gov> > Cc: Nikita Vostrov <nik.vostrov(a)gmail.com> > Subject: [Ifeffit] Re: error message when installing Larch on macbookpro M1 > > Hello, I still get the same error posted in this thread even with the > Python 3. 13. 10 installation script (also on m1 macbook). Sincerely, > Nikita. ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ > ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ > ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ > ZjQcmQRYFpfptBannerStart > This Message Is From an External Sender > This message came from outside your organization. > > ZjQcmQRYFpfptBannerEnd > > Hello, > > I still get the same error posted in this thread even with the Python > 3.13.10 installation script (also on m1 macbook). > > Sincerely, > > Nikita. > > >

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error message when installing Larch on macbookpro M1
by Emmanuelle Montarges Pelletier 24 Feb '26

24 Feb '26

Hi I have recently tried to install xraylarch 26.1.1 version on my computer using the binary installer and/or the GetLarch.sh script. My computer is a macbookpro M1 running with Tahoe26.2 with the binary installer, when I open the « xraylarch » folder, I can not find the Larix application. listing the content of the xraylarch folder, there is a component python.app, but when I try to start it, nothing happens. ls xraylarch _conda envs libexec pkgs shell bin etc LICENSE.txt python.app ssl conda-meta include man sbin condabin lib micromamba share using the GetLarch.sh script , on the terminal window I had this error message : (and same message if I tried to update) 1 error generated. [24/31] Building C object _deps/spglib-build/CMakeFiles/Spglib_symspg.dir/src/refinement.c.o [25/31] Building C object _deps/spglib-build/CMakeFiles/Spglib_symspg.dir/src/spglib.c.o [26/31] Building C object _deps/spglib-build/CMakeFiles/Spglib_symspg.dir/src/spin.c.o [27/31] Building C object _deps/spglib-build/CMakeFiles/Spglib_symspg.dir/src/spacegroup.c.o [28/31] Building C object _deps/spglib-build/CMakeFiles/Spglib_symspg.dir/src/symmetry.c.o ninja: build stopped: subcommand failed. *** CMake build failed [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. ERROR: Failed building wheel for spglib Failed to build spglib error: failed-wheel-build-for-install × Failed to build installable wheels for some pyproject.toml based projects ╰─> spglib Is there anything I can do? as complementary information, I could use an older xraylarch version (from 2023 I think,not sure) thanks in advance for your help all the best Emmanuelle -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*- Emmanuelle Montargès-Pelletier Directrice de Recherche CNRS -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*- LIEC - Laboratoire Interdisciplinaire des Environnements Continentaux CNRS Université de Lorraine 15 avenue du Charmois 54500 VANDŒUVRE-LES-NANCY FRANCE tel bureau +33 (0)3 72 74 47 30 tel mobile +33 (0)6 31 33 10 30 emmanuelle.montarges(a)univ-lorraine.fr -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-

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Problems with importing data in Athena
by Nicolò Orsingher - nicolo.orsingher＠studio.unibo .it 10 Feb '26

10 Feb '26

Dear all, I'm new to the XAS community and I'm currently struggling to solve an issue with the data import with Athena, The issue is simple enough but I didn't manage to solve it. My XAS data measure the fluorescence every 0.2 eV but when I import the files .dat in athena the plotted curve and the exported spectra norm(E).nor have one point every ~0.7/0.8 eV how can I fix this problem? I already tried importing the data in different format .dta, .txt and .csv Any help/tip is very much welcome

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