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This is XeTeX, Version 3.1415926-2.2-0.9997.4 (MiKTeX 2.9)
entering extended mode
(C:\Temp\test.tex
LaTeX2e <2009/09/24>
Babel <v3.8l> and hyphenation patterns for english, afrikaans, ancientgreek, ar
abic, armenian, assamese, basque, bengali, bokmal, bulgarian, catalan, coptic,
croatian, czech, danish, dutch, esperanto, estonian, farsi, finnish, french, ga
lician, german, german-x-2009-06-19, greek, gujarati, hindi, hungarian, iceland
ic, indonesian, interlingua, irish, italian, kannada, kurmanji, lao, latin, lat
vian, lithuanian, malayalam, marathi, mongolian, mongolianlmc, monogreek, ngerm
an, ngerman-x-2009-06-19, nynorsk, oriya, panjabi, pinyin, polish, portuguese,
romanian, russian, sanskrit, serbian, slovak, slovenian, spanish, swedish, swis
sgerman, tamil, telugu, turkish, turkmen, ukenglish, ukrainian, uppersorbian, u
senglishmax, welsh, loaded.
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Document Class: minimal 2001/05/25 Standard LaTeX minimal class
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y"
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l.14 \@zf@mathfalse

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\documentclass{minimal}
\usepackage{xepersian}
\settextfont{XB Niloofar}
\begin{document}
این فقط یک آزمایش است
\end{document}