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Re: 17 & 20 November Downloads

From: Richard Shann
Subject: Re: 17 & 20 November Downloads
Date: Sat, 27 Nov 2021 18:12:49 +0000
User-agent: Evolution 3.38.3-1

On Sat, 2021-11-27 at 10:47 +0000, Joe Wilkinson wrote:
> Hi Richard,
> I am not running with Admin privileges. Too dangerous!!

Yes, however it seems to be the default when first setting up a Windows
10 machine. I thought it worth the experiment to set up a new account
without Admin priviliges on the laptop I have access to. Then I tried
executing Denemo from a memory stick under that account. I was
surprised that it was prepared to execute it without asking for any
special permission, and consequently not so very surprised when it
managed to run LilyPond successfully.

It would in any case be a wrong error message - you are getting the
message that the executable program is not found, not that you don't
have permission to execute it. But I could believe that, but it seems
not to be the problem anyway.


> I did copy the Nov22 unzipped download to a memory stick and tries it
> on 
> a friend's PC.
> It could be that if the fault is with my PC the version had already
> been 
> contaminated since on initiating the batch file denemo immediately
> found 
> the default .denemo file, opened the Typeset window and refused to 
> Typeset. Denemo reported failing to find lilypond, and opening Edit 
> Preferences and, not changing the link to lilypond on the stick, 
> pressing OK gave a similar report.
> Perhaps I should unzip a new download and that from October 20 and
> copy 
> both onto the memory stick, and test both in the same way.
> As another thought: Windows was updated in early November; perhaps
> that 
> has something to do with it (though it does not stop previous version
> from performing.
> Best wishes
> Joe
> On 27/11/2021 10:12, Richard Shann wrote:
> > On Fri, 2021-11-26 at 17:19 +0000, Joe Wilkinson wrote:
> > > Hi Richard.
> > > I've just been using Oct20 and so used that libglib (dated March)
> > > I'm afraid it made no real difference. In the Nov22 download
> > > which I
> > > had
> > > been playing with e.g. the "x" in Graphics editor, I got the same
> > > messages as reported earlier.
> > > In the Nov21 download it simply wouldn't Typeset with the
> > > familiar
> > > message about being unable to load the helper program.
> > > :-(
> > > It is very strange
> > Well we are making progress down the food chain. Denemo tries to
> > run
> > lilypond by executing functions called g_spawn_* which are in the
> > libglib dll. You have now established that the differences in the
> > libglib dll (brought about by being compiled afresh with an updated
> > version of the compiler) are not having this effect. It will take
> > some
> > digging into libglib's source code to establish what functions it
> > is
> > calling to accomplish the launch of the new lilypond process, but
> > it is
> > likely to be "fork" provided by the compiler's libc.
> > That said, we have reached a point where it becomes increasingly
> > unlikely that the problem is a bug in the downstream sources, this
> > compiler and its libc are used in vast swathes of the programs out
> > there in the world as is Windows 10. And you were able to launch
> > Notepad from the Scheme interface inside Denemo.
> > 
> > So we need ideas that perturb what we are doing at the front end -
> > are
> > you running with Administrator priviliges? Does the bug show up for
> > another user on your machine? This is clutching at straws ... any
> > interested (and, perhaps, amused) onlooker have any ideas?
> > 
> > Richard
> > 
> > 
> > 

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