[Ipe-announce] fail to compile document with TeX

[llwaeva at gmail.com]

I am trying to save my document, with only a TeX string inside, as EPS,
but it fails and report this message

This is pdfTeX, Version 3.141592-1.40.3 (MiKTeX 2.6) (preloaded format=pdflatex 2009.1.19)  3 JUN 2009 22:33
entering extended mode
**text.tex
(text.tex
LaTeX2e <2005/12/01>
Babel <v3.8g> and hyphenation patterns for english, dumylang, nohyphenation, ge
rman, ngerman, french, loaded.

("D:\Applications\MiCTeX\MiKTeX 2.6\tex\latex\base\article.cls"
Document Class: article 2005/09/16 v1.4f Standard LaTeX document class
("D:\Applications\MiCTeX\MiKTeX 2.6\tex\latex\base\size10.clo"
File: size10.clo 2005/09/16 v1.4f Standard LaTeX file (size option)
)
\c at part=\count79
\c at section=\count80
\c at subsection=\count81
\c at subsubsection=\count82
\c at paragraph=\count83
\c at subparagraph=\count84
\c at figure=\count85
\c at table=\count86
\abovecaptionskip=\skip41
\belowcaptionskip=\skip42
\bibindent=\dimen102
)
("D:\Applications\MiCTeX\MiKTeX 2.6\tex\latex\graphics\color.sty"
Package: color 2005/11/14 v1.0j Standard LaTeX Color (DPC)

("D:\Applications\MiCTeX\MiKTeX 2.6\tex\latex\00miktex\color.cfg"
File: color.cfg 2005/12/29 v1.1 MiKTeX 'color' configuration
)
Package color Info: Driver file: pdftex.def on input line 130.

("D:\Applications\MiCTeX\MiKTeX 2.6\tex\latex\graphics\pdftex.def"
File: pdftex.def 2007/04/17 v0.04g Graphics/color for pdfTeX
\Gread at gobject=\count87
))
Package color Info: Redefining color red on input line 7.
Package color Info: Redefining color green on input line 8.
Package color Info: Redefining color blue on input line 9.
Package color Info: Redefining color yellow on input line 10.
\bigpoint=\count88
 (text.aux)
LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 22.
LaTeX Font Info:    ... okay on input line 22.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 22.
LaTeX Font Info:    ... okay on input line 22.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 22.
LaTeX Font Info:    ... okay on input line 22.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 22.
LaTeX Font Info:    ... okay on input line 22.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 22.
LaTeX Font Info:    ... okay on input line 22.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 22.
LaTeX Font Info:    ... okay on input line 22.
("D:\Applications\MiCTeX\MiKTeX 2.6\tex\context\base\supp-pdf.tex"
[Loading MPS to PDF converter (version 2006.09.02).]
\scratchcounter=\count89
\scratchdimen=\dimen103
\scratchbox=\box26
\nofMPsegments=\count90
\nofMParguments=\count91
\MPscratchCnt=\count92
\MPscratchDim=\dimen104
\MPnumerator=\count93
\everyMPtoPDFconversion=\toks14
)
! Missing $ inserted.
<inserted text> 
                $
l.26 x^
       2 + y^2%
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <7> on input line 26.
LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <5> on input line 26.
! Extra }, or forgotten $.
l.27 }
      
I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.

! pdfTeX error (ext1): \pdfxform cannot be used with a void box.
<to be read again> 
                   \unskip 
l.29 ...unt0}0\put(0,0){\pdfrefxform\pdflastxform}
                                                  

 
Here is how much of TeX's memory you used:
 728 strings out of 95294
 8390 string characters out of 1184828
 53644 words of memory out of 1057344
 3976 multiletter control sequences out of 60000
 3640 words of font info for 14 fonts, out of 1000000 for 2000
 14 hyphenation exceptions out of 8191
 23i,3n,17p,184b,128s stack positions out of 5000i,500n,10000p,200000b,32768s
!  ==> Fatal error occurred, no output PDF file produced!