Many thanks Matt, It works now fine! for me the command that worked was: C:\Users\<UserName>\xraylarch\python -m pip install --upgrade “xraylarch[larix]”, i.e. "--upgrade..." instead of "–update..." "update" received a message "command not found". thank you for a great software! with best regards, Gleb. On 15/09/2025 16:54, matt.newville@gmail.com wrote:

Hi Gleb,

Sorry for the trouble.  I’ve seen a few similar reports.   I think this will be fixed with

    C:/Users/<UserName>/xraylarch/python -m pip install –update “xraylarch[larix]”

(note the added “[larix]” bit, and you will need the double quotes).    This should be the default way to update Larch – it’s just that some people want to be able to install Larch without any GUI at all.  That’s reasonable, but it also means that the “current instruction” of

        …./python -m pip install –update xraylarch

Does not look for changes to packages needed by the GUI.  Which includes ‘darkdetect’ and recent updates to ‘wxmplot’.

Sorry for the trouble, and we will solve this for the next release.

For everyone,  please use

C:/Users/<UserName>/xraylarch/python -m pip install –update “xraylarch[larix]”

On Linux or macOS that would be something like:

   /home/<Username>/xraylarch/bin/python -m pip install –update “xraylarch[larix]”

Or

   /Users/<Username>/xraylarch/bin/python -m pip install –update “xraylarch[larix]”

Thanks,

--Matt

Hello, I tried to update Larch 2025. 1 (that was installed at C: \Users\<MyName>\xraylarch and worked fine on Win10) to the latest version of 2025. 3. 0, using the "Update_larch" shortcut icon. it was "updated" within a few seconds and the

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*From: *Gleb Pokrovski via Ifeffit *Date: *Monday, September 15, 2025 at 9:43 AM *To: *ifeffit@millenia.cars.aps.anl.gov *Cc: *Gleb Pokrovski *Subject: *[Ifeffit] Re: Larch 2025.3.0 update problem on Win 10

Hello,

I tried to update Larch 2025.1 (that was installed at C:\Users\<MyName>\xraylarch and  worked fine on Win10) to the latest version of 2025.3.0, using the "Update_larch" shortcut icon. it was "updated" within a few seconds and the command window closed, but when launching  "Larix" (i.e. clicking on the larix shortcut icon) the  message posted below is displayed in the terminal that then closes after a few seconds. I re-ran Update_larch 2 times with the same effect. Paradoxically, all other applications e.g., XRD viewer, XRF mapper open when clicking on the corresponding icon, and display the latest version 2025.3... ----------------------------------------------- # run in conda environment "base": # C:/Users/glebou/xraylarch/Scripts/larix.exe Exception in thread Thread-1 (importer): Traceback (most recent call last):   File "C:\Users\glebou\xraylarch\Lib\threading.py", line 1075, in _bootstrap_inner     self.run()   File "C:\Users\glebou\xraylarch\Lib\threading.py", line 1012, in run     self._target(*self._args, **self._kwargs)   File "C:\Users\glebou\xraylarch\Lib\site-packages\larch\wxxas\larix_app.py", line 58, in importer     from larch.wxxas.xasgui import LarixFrame   File "C:\Users\glebou\xraylarch\Lib\site-packages\larch\wxxas\xasgui.py", line 54, in <module>     from .xas_controller import XASController   File "C:\Users\glebou\xraylarch\Lib\site-packages\larch\wxxas\xas_controller.py", line 11, in <module>     import darkdetect ModuleNotFoundError: No module named 'darkdetect' Traceback (most recent call last):   File "C:\Users\glebou\xraylarch\Lib\site-packages\wx\core.py", line 3427, in <lambda>     lambda event: event.callable(*event.args, **event.kw) ) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^   File "C:\Users\glebou\xraylarch\Lib\site-packages\larch\wxxas\larix_app.py", line 62, in ShowMain     from larch.wxxas.xasgui import LarixFrame   File "C:\Users\glebou\xraylarch\Lib\site-packages\larch\wxxas\xasgui.py", line 54, in <module>     from .xas_controller import XASController   File "C:\Users\glebou\xraylarch\Lib\site-packages\larch\wxxas\xas_controller.py", line 11, in <module>     import darkdetect ModuleNotFoundError: No module named 'darkdetect' ----------------------------------------------------------------------------------

Probably the update option fails to properly update from 2025.1 to 2025.3 directly ? should I go for a complete re-installation?

thank you best regards Gleb Pokrovski

On 10/09/2025 20:47, Matthew Newville via Ifeffit wrote:

Hi Folks, A new version of Larch and the Larix GUI are now available for download and for automated update. The last message about Larch 2025. 2. 0 was in late May, though there were updates pushed on in late July too. Since then, there have been

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Hi Folks,

A new version of Larch and the Larix GUI are now available for download and for automated update.  The last message about Larch 2025.2.0 was in late May, though there were updates pushed on in late July too.  Since then, there have been many updates and improvements, especially to the Larix GUI.

A more complete list of changes is at https://urldefense.us/v3/__https://github.com/xraypy/xraylarch/releases/tag/... https://urldefense.us/v3/__https:/github.com/xraypy/xraylarch/releases/tag/2... (and see https://urldefense.us/v3/__https://github.com/xraypy/xraylarch/releases/tag/... https://urldefense.us/v3/__https:/github.com/xraypy/xraylarch/releases/tag/2... too), but a few of the most obvious changes include:

1.The “List of Groups/Files” in Larix and many related “List of Groups” windows have a richer set of options with the Right Mouse Button. All these actions also now have "keyboard shortcuts" or "accelerators" (Ctrl- / Alt- keys) that do most actions to move and select groups. This allows much faster and easier manipulation of the list of datasets.

2.Configuring lotting options such as linewidths, colors, themes, and so forth is easier and better. The "plot" tab is "Edit Preferences" now has (only) a "Save Plot Configuration" to save the configuration of the current Plot Window #1 (to the file ".larch/wxmplot.yaml"). From the Plot Window,  you can configure these settings (themes, colors, etc) for any plot.  When you are happy with those, saving them from the Larix Preferences window will save those settings for future sessions.

3.Saving and Loading Session Files is more robust, and saving will happen in the background, without hanging the main window.

4.The main Larix window now has a Title (ie, “Top Window Bar”) that shows the name of the “Current Session File”. You can change that with “Save Session As”.  The Plot Windows (or most of them anyway) will have Titles that show this Session File name and the name of the Analysis Panel or Data Task window that generated the plot.  If you are running 2 Larix sessions, this makes it much easier to tell what windows go together.

5.On startup, you may be prompted to open recently automatically saved Session files for Sessions that did not exist cleanly.  There has long been a list of “autosaved sessions” that you can import, but this will tell you if any session did not close well.

6.2025.2.0 introduces a Generic XY Data Analysis Panel, for non-XAS data.  You can now choose any X, Y arrays for a group as the XY data, and overplot several groups of scaled or unscaled datasets.  And the Curve Fit Panel allows pretty generic curve-fitting for X, Y data.

There have been many bug fixes and other improvements, too.

As always, Mauro Rovezzi and Shelly Kelly and her group at the APS deserve a lot of credit for either making or inspiring these changes.  There have also been bug reports and pull requests from a growing number of people.  The GitHub repository is really the best place for this, but thanks to everyone.

Let us know if you have any questions, comments, or suggestions.

--Matt

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Dear Matt, Thank you very much, with the header you suggested the file opens fine! I think that Larch XRD1D viewer is a very useful practical tool, thanks! If, in some future version, there would eventually  be a possibility to: - disable the scaling factor/scaling methods, to be able to plot just the raw data as is; and - to allow saving a group of spectra together with references as a "project" (like in athena or larix), it would be really great. thank you again with best regards Gleb On 16/09/2025 16:45, matt.newville@gmail.com wrote:

Hi Gleb,

Sorry for the trouble.  I think we’re not doing a great job on “read standard XY” files – we probably have fairly limited experience with all the software that can produce XY files.

A header like this:

# 2th_deg Intensity

2.0000 37.222

2.0082 37.399

2.0164 36.199

2.0245 35.727

Will work for your file - needing the “#” and then calling “2th” to specify 2-theta.

I think we would be happy to be able to make this better!

FWIW, this should also be able a TIFF file and a correponding PONI calibration file as used by pyFAI.

--Matt

Hello, Could someone, please, send me an example of an XRD file that could be read by the Larch XRD1D viewer? It seems that none of my x-y 2 column files I tried can be read (attached), with or without a header: the error message is attached

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*From: *Gleb Pokrovski via Ifeffit *Date: *Tuesday, September 16, 2025 at 6:37 AM *To: *ifeffit@millenia.cars.aps.anl.gov *Cc: *Gleb Pokrovski *Subject: *[Ifeffit] Re: Larch 2025.3.0: Larch XRD1D viewer: reading XRD files

Hello,

Could someone, please, send me an example of an XRD file that could be read by the Larch XRD1D viewer? It seems that none of my x-y 2 column files I tried can be read (attached),  with or without a header: the error message is attached here as a screen caption. Should the file header/file itself  have a particular syntax/format to be read?

thank you, with best regards, Gleb

On 10/09/2025 20:47, Matthew Newville via Ifeffit wrote:

Hi Folks, A new version of Larch and the Larix GUI are now available for download and for automated update. The last message about Larch 2025. 2. 0 was in late May, though there were updates pushed on in late July too. Since then, there have been

ZjQcmQRYFpfptBannerStart

*This Message Is From an External Sender *

This message came from outside your organization.

ZjQcmQRYFpfptBannerEnd

Hi Folks,

A new version of Larch and the Larix GUI are now available for download and for automated update.  The last message about Larch 2025.2.0 was in late May, though there were updates pushed on in late July too.  Since then, there have been many updates and improvements, especially to the Larix GUI.

A more complete list of changes is at https://urldefense.us/v3/__https://github.com/xraypy/xraylarch/releases/tag/... https://urldefense.us/v3/__https:/github.com/xraypy/xraylarch/releases/tag/2... (and see https://urldefense.us/v3/__https://github.com/xraypy/xraylarch/releases/tag/... https://urldefense.us/v3/__https:/github.com/xraypy/xraylarch/releases/tag/2... too), but a few of the most obvious changes include:

1.The “List of Groups/Files” in Larix and many related “List of Groups” windows have a richer set of options with the Right Mouse Button. All these actions also now have "keyboard shortcuts" or "accelerators" (Ctrl- / Alt- keys) that do most actions to move and select groups. This allows much faster and easier manipulation of the list of datasets.

2.Configuring lotting options such as linewidths, colors, themes, and so forth is easier and better. The "plot" tab is "Edit Preferences" now has (only) a "Save Plot Configuration" to save the configuration of the current Plot Window #1 (to the file ".larch/wxmplot.yaml"). From the Plot Window,  you can configure these settings (themes, colors, etc) for any plot.  When you are happy with those, saving them from the Larix Preferences window will save those settings for future sessions.

3.Saving and Loading Session Files is more robust, and saving will happen in the background, without hanging the main window.

4.The main Larix window now has a Title (ie, “Top Window Bar”) that shows the name of the “Current Session File”. You can change that with “Save Session As”.  The Plot Windows (or most of them anyway) will have Titles that show this Session File name and the name of the Analysis Panel or Data Task window that generated the plot.  If you are running 2 Larix sessions, this makes it much easier to tell what windows go together.

5.On startup, you may be prompted to open recently automatically saved Session files for Sessions that did not exist cleanly.  There has long been a list of “autosaved sessions” that you can import, but this will tell you if any session did not close well.

6.2025.2.0 introduces a Generic XY Data Analysis Panel, for non-XAS data.  You can now choose any X, Y arrays for a group as the XY data, and overplot several groups of scaled or unscaled datasets.  And the Curve Fit Panel allows pretty generic curve-fitting for X, Y data.

There have been many bug fixes and other improvements, too.

As always, Mauro Rovezzi and Shelly Kelly and her group at the APS deserve a lot of credit for either making or inspiring these changes.  There have also been bug reports and pull requests from a growing number of people.  The GitHub repository is really the best place for this, but thanks to everyone.

Let us know if you have any questions, comments, or suggestions.

--Matt

ifeffit mailing list:https://millenia.cars.aps.anl.gov/mailman3/lists/ifeffit.millenia.cars.aps.a...

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