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Re: Import XML fails with python error [Macport LilyPond with Frescoblad

From: Jim Weisbin
Subject: Re: Import XML fails with python error [Macport LilyPond with Frescobladi]
Date: Tue, 12 Oct 2021 16:02:41 -0400

I was under some pressure to get this working for a client, who was 
unfortunately on Mac OS Catalina. I tried importing xml files with many many 
different combinations of Lilypond and Frescobaldi. The only combination I 
could get to work was with Frescobaldi 3.1.2 and an "unofficial" build of 
Lilypond from this link 
(Fresocobaldi 3.1.3 also failed with errors).

That combination "worked", but there were too many spurious details in the 
output, such as many "stems up" directives that should not have been there.

In the end we were able to get things working on another computer running 
Mojave, with Frescobaldi 3.1.3 and an official build of Lilypond version 2.18. 
Later builds also failed to import musicxml files.

In the end that combo seems to work, but completely fails to import lyrics, 
with no errors reported.

I'm no Python expert, but I have done a bit of Python programming. I tried 
different versions of Python, but I can see that the Lilypond application has a 
Python executable built in. So does the system's Python ever come into play, 
and if so, why? Does Frescobaldi depend on it? Different versions of python on 
the system seemed to have no effect on the output errors.

> On Oct 12, 2021, at 2:09 PM, Jonas Hahnfeld <hahnjo@hahnjo.de> wrote:
> Am Montag, dem 11.10.2021 um 23:49 +0200 schrieb Jean Abou Samra:
>> Le 10/10/2021 à 10:15, James a écrit :
>>> Hello Jim,
>>> I didn't see any replies to this but it seems to me that this might be 
>>> Frescobaldi specific. The Frescobaldi developer lurks on these lists 
>>> but it might be worth pinging him directly.
>>> There are a number of ways - https://frescobaldi.org/links.
>>> Regards
>>> James
>> It has been reported independently at
>> https://gitlab.com/lilypond/lilypond/-/issues/6189,
>> where Jonas diagnosed a problem in MacPorts' Python.
> Well, that's the guess until somebody either confirms and refutes the
> proposed explanation.
> Jonas

Jim Weisbin | C.T.O. | Human | Post Human | 27 West 20th Street | Suite 801 | 
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