xchangecontext isn't in musixtex.tex; it's defined in pmx.tex.  I believe
the crucial difference is how end-of-system is handled.

Bob

On Fri, Aug 11, 2023 at 7:32 PM <dsim...@roadrunner.com> wrote:

> Not that I remember anything about the detail, but looking at the TeX that
> PMX generates, it appears to use \xchangecontext rather than \Changecontext
> to activate the key change. Furthermore, searching thru the PMX source
> code, it doesn’t ever use \Changecontext. However, I still don’t know
> exactly what image Jean-Pierre was trying to create when he first generated
> the error, since he hasn’t yet provided such an image.
>
>
>
> --Don
>
>
>
> *From:* TeX-Music <tex-music-bounces+dsimons=roadrunner....@tug.org> *On
> Behalf Of *Bob Tennent
> *Sent:* Friday, August 11, 2023 2:49 PM
> *To:* Werner Icking Music Archive <tex-music@tug.org>
> *Subject:* Re: [Tex-music] check@staff ... specified range
>
>
>
> This suggests that PMX doesn't invoke the buggy code in musixtex.tex.
>
>
>
> On Fri, Aug 11, 2023 at 2:12 PM <dsim...@roadrunner.com> wrote:
>
> Jean-Pierre--
>
> The attached image roughly reproduces your most recent 1-instrument image,
> but with an added instrument above with only blank rests. It came from this
> file:
>
> ========================
> 3 2 3 4 3 4 0 1
> 1 2 20 0
>
>
> ttt
> ./
> AS0-
> f24 za zc zd g-4 zb zd | b zd b zd g- zb | a2 zc ,g zb | b4 zd b zd g- zb /
> a45x3 d- c a+x3 d- c g+x3 d b | b+8 d- b+ d- g d | a+ d- a+ d- g d |
>   b+ d- b+ d- g d /
> rbd2 | rbd | rbd | rbd /
> K+0+3
> Rd
> a44 zc d- g zb | d d- b+ | d d- a+ /
> a85 d- a+ d- g d | b+ d- b+ d- g d | b+ d- b+ d- g d /
> rbd2 | rbd | rbd /
> Rl
> Cb
> dd23 zd- | rp Rr /
> a85 a- d a f+ a- | a+ f d a f d /
> rb2d | rbd /
> =========================
>
> However, I'm still not clear on exactly what you were trying to create when
> you generated the error. The two different versions of your tex file that
> do
> work produce two different images. I wanted to create a PMX file that tries
> to do EXACTLY what you were trying to do when you generated the error.
>
> --Don
>
> > -----Original Message-----
> > From: TeX-Music <tex-music-bounces+dsimons=roadrunner....@tug.org>
> > On Behalf Of Jean-Pierre Coulon
> > Sent: Friday, August 11, 2023 10:30 AM
> > To: Werner Icking Music Archive <tex-music@tug.org>
> > Subject: Re: [Tex-music] check@staff ... specified range
> >
> > On Fri, 11 Aug 2023, dsim...@roadrunner.com wrote:
> >
> > > Jean-Pierre, could you post a .tex file that works and shows exactly
> > > what you want? I'm trying to reproduce whatever your problem is with a
> > > PMX-generated file, and so far cannot recreate the problem. The
> > > following PMX file runs fine:
> >
> > If you change \generalsignature3\Changecontext into \bar in my example it
> > works.
> >
> > If you say \instrumentnumbers1 instead of 2 it works too. See my pdf.
> >
> > Please post the pdf output of your PMX.
> >
> > --
> > Jean-Pierre Coulon
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