Dirk Laurie wrote:
> After the latest changes to M-Tx on GitHub, I was tempted to remove
> "\input pmx" from mtx.tex since it is no longer needed there and will be
> input from the .tex files made by PMX.
>
> Doing so gives an error "No room for a new \read" on the big mtxdoc.ltx
> build. Apparently one is not allowed more than 12 file handles. This
> should of course be fine.
>
> But for some reason, pmx.tex is reloaded every time. I'm using a modified
> pmx.tex (attached) that tests on \pmxversion and writes entry/exit
> messages. The original mtx.tex with "\input pmx"
> duly gives "Already loaded PMX 2.72" as expected.
>
> I can solve my problem, easily: just don't remove "\input pmx".
> But I can't understand why it happens.
>
> The complete logs of the whole musixtex.tex pass are also attached, but
> let me reduce it to simple terms in terms of how every small TeX file made
> by PMX starts.
>
> Case 1:
>
> \input mtx % Does not contain "\input pmx"
> \input musixtex
> \input pmx % Reloads it every time.
>
> Case 2:
>
> \input mtx % Contains "\input pmx".
> \input musixtex
> \input pmx % Sees \pmxversion and does not reload it.
>
> As you can see, mtx.tex starts with exactly the same kind of test that
> pmx.tex does. Since \mtxversion is seen the next time that \input mtx
> comes along, its "input pmx" happens once only. I.e. I can understand why
> keeping it in works.
>
> But I can't understand why \pmxversion is not also seen.
When running your version without \input pmx (Case 1), try altering pmx.tex to
have \gdef\pmxversion{2.72} instead of \def - what happens then?
David
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