Hi Aditya

I tried the new code you send me, and of course I did a quick test.
But when doing a texmfstart texexec --autopdf --pdf testalignfontnew.tex
texexec hangs ''forever''  while trying to process the \section{} command.
Actually its pdftex trying to do something.

To make sure I did not make a edit mistake, I copied my old test code into
the file testalignfontnew.tex and run a diff to see where the difference 
with the new code
are.

Looking at the code (and I am not a Tex expert, and forgive me, when I 
ask a dumb question)
I don't see where the \scratchcounter itself is defined ? Must surely be 
a global Context counter ?

Attached the new test code.
Hope it helps the debugging process and thanks for all your help sofar.

Wim

> Hi Wim,
>
> Quoting WN <wneimeijer@tiscali.nl>:
>
>   
>> I tried your code and performed more tests. My first tests show your fix
>> works. But than I added a \section{} in my test code and I am sorry 
>> to say that
>> the math matrix alignment does not work at that point.
>>     
>
> :-) Section modifies \!!counta so things get messed up again. Actually, 
> this really helped to narrow down the bug. Basically, dostartmatrix 
> does a test
>
> \scratchcounter=\ifnum\eqaligncolumn>\scratchcounter \eqaligncolumn 
> \else \plusone \fi
>
> which is comparing eqaligncolmn with scratch counter, but 
> scratchcounter is never initialized. Therefore, everything depends on 
> what was the value of scratchcounter, which explains, different 
> behaviour depending on when the matrix  occurred, and why you had a 
> hard time pinning down a minimal example.
>
> The fix is easy, change the scratchcounter to zerocount (or maybe just 
> change to \ifcase\eqaligncolunm). So add this to your file,
>
> \unprotect
> \def\dostartmathmatrix[#1][#2]%
>   {\begingroup
>    \edef\currentmathmatrix{#1}%
>    \doifassignmentelse{#2}{\setupmathmatrix[#1][#2]}\donothing
>    \null
>    
> \executeifdefined{\??mx:\mathmatrixparameter\c!location}{\getvalue{\??mx:\v!lohi}}%
>    \mathmatrixleft
>    \mathmatrixbox\bgroup
>    \pushmacro\domatrixNC
>    \let\endmath\relax
>    \def\NC{\domatrixNC}%
>    \def\MC{\domatrixNC\ifmmode\else$\def\endmath{$}\fi}%
>    \global\let\domatrixNC\dodomatrixNC
>    \def\NR{\endmath\global\let\domatrixNC\dodomatrixNC\crcr}%
>    \normalbaselines
>    \mathsurround\zeropoint
>    \everycr\emptytoks
>    \tabskip\zeropoint
>    \eqaligncolumn\zerocount 
> \processcommacommand[\mathmatrixparameter\c!align]{\advance\eqaligncolumn\plusone\dosetmatrixcolumn}%
>    \scratchcounter=\ifnum\eqaligncolumn>\zerocount \eqaligncolumn \else 
> \plusone \fi
>    \global\eqaligncolumn\plusone
>    \preparemathmatrix } % uses scratchcounter
> \protect
>
>
> Aditya
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