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From: Tobias Burnus <burnus@net-b.de>
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Subject: \subformulanumber no longer working
Date: Sun, 28 Oct 2001 19:08:54 +0100
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Hi,

I have something like this:
--------------------------------
\placeformula
$$
\eqalignno{
  h\nu &=E=c\frac{h}{\lambda}&\formulenummer{a}\cr
  \Rightarrow \lambda &= c\frac{h}{\Delta E} = (247\pm3)~{\rm nm}
                         &\subformulenummer{b}\cr
  \Rightarrow     \nu &= \frac{\Delta E}{h} =
(1{,}21\pm0{,}02)10^{15}~{\rm Hz}
                         &\subformulenummer{c}\cr}
$$
\bye
---------------------------------

it was definitly working, but now it causes error messages.

If I remove the \placeformula (and replace the \[sub]formulanumber by ""
(so a, b and c remain)) everything works as expected.

Please send me a bug fix soon.

Tobias

PS: The error message is:
----------------------
! Missing $$ inserted.
<to be read again> 
                   \floatrighteqo 
<argument> \eqno 
                 {\doformulenummer [][][]{}}
\doifelse ...\ifx \!!stringa \!!stringb #3\else #4
                                                  \fi 
\dostopformula ->\doplaceformulanumber 
                                       \getvalue {\e!stop \getvalue
{\??fm \...
l.9 $$
----------------------
-- 
This above all: To thine own self be true / And it must follow as
the night the day / Thou canst not then be false to any man.