[Ifeffit] Not possible to install Larch MacOS X 10.12.6 via anaconda (see report)

[Matt Newville]

Hi Stefan,

Sorry for the trouble.  It's always a little tricky to diagnose a problem
of "it doesn't work", but here are a couple of things to try:

If you can open the Anaconda Prompt (from Start Menu it may be under
"Anaconda3 (64-bit) and then "Anaconda Prompt (xraylarch)") where you ran
'larch -m" from, try running

    C:>   xas_viewer

That is supposed to run, but I suspect that it might print out some error
messages.  If I had to guess, some package is not correctly installed.

Second, it might be helpful just to run (from the same prompt):

    C:> conda update --all


and see if that installs some updates or spins forever.  If it finishes,
then try running "xas_viewer" again.

Third, you could just try reinstalling from scratch.  That might be
"easiest", but if you have the patience to try the other approaches above
it would help identify what the problem is.

--Matt


On Mon, Mar 15, 2021 at 7:59 AM Mangold, Stefan (IPS) <
stefan.mangold at kit.edu> wrote:

> Thanks Matt,
>
> installation worked. But still have the problem, that I can’t start XAS
> Viewer. I executed also larch -m (no error message).
>
> regards
>
> Stefan
>
> Am 13.03.2021 um 16:35 schrieb Matt Newville <newville at cars.uchicago.edu>:
>
> Hi Stefan, Morgane, All,
>
> Yeah, sorry for the trouble with this.   I should admit I've had
> increasing struggles over the past year or two with maintaining packages
> for Anaconda Python, running into many painful claims of incompatible
> packages.    Most of the "core scientific python packages" are
> well-maintained by Anaconda.com -- it's hard to complain about this free
> distribution and all of the work that goes into it.   But the
> "non-Anaconda-provided" packages make Larch more complicated, and the
> xraylarch "conda" package is out-of-date.
>
> The semi-good news on this front is that almost everything, including
> Larch, is actually available from the PyPI packaging system and can be
> installed with "pip".  Anaconda and its "conda" package-manager will
> regularly say to not mix "conda" and "pip", but this mostly applies to
> cases where C code is going to be compiled on installation, which we don't
> do.
>
> What I'm now doing for building the binary distributions, and what I
> recommend for updating is:
>    1. install a basic Anaconda distribution - this can be from the Larch
> binary installers.
>    2. install or update the Larch code with  "pip install --upgrade
> xraylarch".
>
> I should probably take another look at adding xraylarch to the
> large-and-diverse "conda_forge" channel for the "conda" system.
>
> Hope that helps, and suggestions on how to handle this better would be
> most welcome,
>
> --Matt
>
>
> On Fri, Mar 12, 2021 at 10:07 AM Morgane Desmau <morgane.desmau at gmail.com>
> wrote:
>
>> Hello,
>>
>> I already had this issue and it was related to the python version (6/7
>> months ago with python 3.8, and then it worked with Python 3.7, but I was
>> thinking it was fixed since).
>>
>> Best,
>> Morgane Desmau
>>
>> Le ven. 12 mars 2021 à 16:55, Mangold, Stefan (IPS) <
>> stefan.mangold at kit.edu> a écrit :
>>
>>> Dear all,
>>>
>>> I tried to reinstall; before I updated and couldn’t open larch anymore
>>>
>>>
>>> conda install -yc GSECARS xraylarch
>>> Collecting package metadata (current_repodata.json): done
>>> Solving environment: failed with initial frozen solve. Retrying with
>>> flexible solve.
>>> Solving environment: failed with repodata from current_repodata.json,
>>> will retry with next repodata source.
>>> Collecting package metadata (repodata.json): done
>>> Solving environment: failed with initial frozen solve. Retrying with
>>> flexible solve.
>>> Solving environment: /
>>> Found conflicts! Looking for incompatible packages.
>>> This can take several minutes.  Press CTRL-C to abort.
>>> failed
>>>
>>>
>>>
>>>
>>> UnsatisfiableError: The following specifications were found to be
>>> incompatible with each other:
>>>
>>>
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>
>
> --
> --Matt Newville <newville at cars.uchicago.edu> 630-327-7411
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-- 
--Matt Newville <newville at cars.uchicago.edu> 630-327-7411
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