Hi -- attached is an example .lyx file which illustrates
the problem.  Thank you very much for your help and
interest.

Best,

Alex


Andre Poenitz wrote:

> On Thu, Feb 14, 2002 at 05:50:35PM -0500, Alex Casti wrote:
> > It happens often, but not always, which perplexes me even further.
>
> Hm... and I cannot reproduce it. Maybe you could just save a .lyx and send
> it to me if this occurs the next time?
>
> > Sometimes this error occurs when I use a new version of lyx
> > to open an old .lyx document (generated by an older version of lyx).
> > Many errors of this type occur, despite the fact that the older version
> > of lyx that I used to generate the file accepted these horizontal spaces
> > with no LATEX compilation errors.
>
> There have been no big changes to the math code in the stable tree
> including your 1.1.6fix4 for about three years.  This puzzles me further.
>
> Andre'
>
> --
> André Pönitz .............................................. [EMAIL PROTECTED]
#LyX 1.1 created this file. For more info see http://www.lyx.org/
\lyxformat 218
\textclass article
\begin_preamble
\pagestyle{empty}
\setlength{\topmargin}{-0.5in}
\setlength{\oddsidemargin}{0.2in}
\setlength{\evensidemargin}{0.2in}
\setlength{\textheight}{8.6in}
\setlength{\textwidth}{6.1in}
%****** Begin Definitions ***************************
\def\mskip{\hspace{.05in}}
\def\mskipp{\hspace{.1in}}
\def\neg{\hspace{.05in}}
\def\for{\hspace{.05in}}
\def\hs{\hspace{.25in}}
\def\ns{\hspace{-.03in}}
\def\nss{\hspace{-.17in}}
\def\nsss{\hspace{-.1in}}
\def\nege{\ns = \ns}
\def\order{{\cal{O}}}
\def\la{\hbox{\raise.35ex\rlap{$<$}\lower.6ex\hbox{$\sim$}\ }}
\def\ga{\hbox{\raise.35ex\rlap{$>$}\lower.6ex\hbox{$\sim$}\ }}
\def\beq{\begin{equation}}
\def\eeq{\end{equation}}
\def\beqa{\begin{eqnarray}}
\def\eeqa{\end{eqnarray}}
\def\eps{\epsilon}
%****** End Definitions ***************************
\end_preamble
\language english
\inputencoding default
\fontscheme default
\graphics default
\float_placement ht
\paperfontsize 10
\spacing single 
\papersize Default
\paperpackage a4
\use_geometry 1
\use_amsmath 0
\paperorientation portrait
\leftmargin 1in
\topmargin 1in
\rightmargin 1in
\bottommargin 1in
\secnumdepth 3
\tocdepth 3
\paragraph_separation indent
\defskip medskip
\quotes_language english
\quotes_times 2
\papercolumns 1
\papersides 1
\paperpagestyle default

\layout Standard


\series bold 
Example lyx file illustrating the error
\layout Standard


\series bold 
Message I frequently get when I insert
\layout Standard


\series bold 
horizontal space within the math equation mode.
 
\layout Standard


\latex latex 

\backslash 
vspace{.3cm}
\layout Standard


\latex latex 

\backslash 
noindent
\backslash 
fbox{
\backslash 
rm
\backslash 
bf{Some Equation}}
\layout Standard


\latex latex 

\backslash 
vspace{.1cm}
\layout Standard


\latex latex 

\backslash 
noindent 
\latex default 
Suppose 
\begin_inset Formula \( {\cal V}=P_{3}[x] \)
\end_inset 

 and 
\begin_inset Formula \( {\cal W}=P_{4}[x] \)
\end_inset 

, where 
\begin_inset Formula \( P_{n}[x] \)
\end_inset 

 is the vector space of 
\begin_inset Formula \( n^{{\rm th}} \)
\end_inset 

-order polynomials:
\layout Standard


\begin_inset Formula \[
P_{n}[x]=\left\{ p(x)\mid p(x)=c_{0}+c_{1}x+\ldots +c_{n-1}x^{n-1}+c_{n}x^{n}\right\} 
\, \, .\]

\end_inset 

 If you take the horizontal space before the period out of the above equation,
 then the LATEX compilation error disappears.
\the_end

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