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Problem with xtemplate

Hi all,

Today, I updated MIKTeX and now I have a problem. If I compile a file 
whose contents are

\documentclass{article}
\usepackage{xfrac}
\begin{document}
$\sfrac{1}{2}$
\end{document}

then I get this error message:

! Missing number, treated as zero.
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

What is happening here? I am going to add the full log file after the 
end of this message.

Best regards,

Jose Carlos Santos

------------------------------ log file ------------------------------

This is pdfTeX, Version 3.1415926-2.3-1.40.12 (MiKTeX 2.9) (preloaded 
format=pdflatex 2011.6.2)  8 FEB 2012 10:24
entering extended mode
**\input test.tex
(c:\Users\jcsantos\Documents\temp\test.tex
("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls"
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo"
File: size10.clo 2007/10/19 v1.4h 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
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3packages\xfrac\xfrac.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\ams\math\amstext.sty"
Package: amstext 2000/06/29 v2.01

("C:\Program Files\MiKTeX 2.9\tex\latex\ams\math\amsgen.sty"
File: amsgen.sty 1999/11/30 v2.0
\@emptytoks=\toks14
\ex@=\dimen103
))
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\graphicx.sty"
Package: graphicx 1999/02/16 v1.0f Enhanced LaTeX Graphics (DPC,SPQR)

("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\keyval.sty"
Package: keyval 1999/03/16 v1.13 key=value parser (DPC)
\KV <at> toks@=\toks15
)
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\graphics.sty"
Package: graphics 2009/02/05 v1.0o Standard LaTeX Graphics (DPC,SPQR)

("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\trig.sty"
Package: trig 1999/03/16 v1.09 sin cos tan (DPC)
)
("C:\Program Files\MiKTeX 2.9\tex\latex\00miktex\graphics.cfg"
File: graphics.cfg 2007/01/18 v1.5 graphics configuration of teTeX/TeXLive
)
Package graphics Info: Driver file: pdftex.def on input line 91.

("C:\Program Files\MiKTeX 2.9\tex\latex\pdftex-def\pdftex.def"
File: pdftex.def 2011/05/27 v0.06d Graphics/color for pdfTeX

("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\infwarerr.sty"
Package: infwarerr 2010/04/08 v1.3 Providing info/warning/message (HO)
)
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ltxcmds.sty"
Package: ltxcmds 2011/04/18 v1.20 LaTeX kernel commands for general use (HO)
)
\Gread <at> gobject=\count87
))
\Gin <at> req <at> height=\dimen104
\Gin <at> req <at> width=\dimen105
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3packages\l3keys2e\l3keys2e.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\expl3.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3names.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3bootstrap.sty"
Package: l3bootstrap 2011/12/29 v3110 L3 Experimental bootstrap code
)
Package: l3names 2011/12/30 v3113 L3 Experimental namespace for primitives
)
("C:\Program Files\MiKTeX 2.9\tex\latex\misc\etex.sty"
Package: etex 1998/03/26 v2.0 eTeX basic definition package (PEB)
\et <at> xins=\count88
)
Package: expl3 2012/01/31 v3287 L3 Experimental code bundle wrapper

("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\color.sty"
Package: color 2005/11/14 v1.0j Standard LaTeX Color (DPC)

("C:\Program Files\MiKTeX 2.9\tex\latex\00miktex\color.cfg"
File: color.cfg 2007/01/18 v1.5 color configuration of teTeX/TeXLive
)
Package color Info: Driver file: pdftex.def on input line 130.
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3basics.sty"
Package: l3basics 2012/01/15 v3196 L3 Experimental basic definitions
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3expan.sty"
Package: l3expan 2012/01/15 v3196 L3 Experimental argument expansion
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3tl.sty"
Package: l3tl 2012/01/31 v3286 L3 Experimental token lists
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3seq.sty"
Package: l3seq 2012/01/09 v3158 L3 Experimental sequences and stacks
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3int.sty"
Package: l3int 2012/01/21 v3216 L3 Experimental integers
\c_max_int=\count89
\l_tmpa_int=\count90
\l_tmpb_int=\count91
\l_tmpc_int=\count92
\g_tmpa_int=\count93
\g_tmpb_int=\count94
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3quark.sty"
Package: l3quark 2012/01/08 v3148 L3 Experimental quarks
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3prg.sty"
Package: l3prg 2012/01/28 v3250 L3 Experimental control structures
\g_prg_map_int=\count95
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3clist.sty"
Package: l3clist 2012/01/09 v3157 L3 Experimental comma separated lists
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3token.sty"
Package: l3token 2012/01/25 v3234 L3 Experimental token manipulation
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3prop.sty"
Package: l3prop 2012/01/09 v3158 L3 Experimental property lists
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3msg.sty"
Package: l3msg 2012/01/08 v3153 L3 Experimental messages
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3io.sty"
Package: l3io 2012/01/28 v3245 L3 Experimental input-output operations
\l_iow_stream_int=\count96
\l_iow_line_length_int=\count97
\l_iow_target_length_int=\count98
\l_iow_current_line_int=\count99
\l_iow_current_word_int=\count100
\l_iow_current_indentation_int=\count101
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3file.sty"
Package: l3file 2012/01/31 v3287 L3 Experimental file operations
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3skip.sty"
Package: l3skip 2012/01/07 v3139 L3 Experimental dimensions and skips
\l_tmpa_dim=\dimen106
\l_tmpb_dim=\dimen107
\l_tmpc_dim=\dimen108
\g_tmpa_dim=\dimen109
\g_tmpb_dim=\dimen110
\l_tmpa_skip=\skip43
\l_tmpb_skip=\skip44
\l_tmpc_skip=\skip45
\g_tmpa_skip=\skip46
\g_tmpb_skip=\skip47
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3keys.sty"
Package: l3keys 2011/12/22 v3086 L3 Experimental key-value interfaces
\g_keyval_level_int=\count102
\l_keys_choice_int=\count103
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3fp.sty"
Package: l3fp 2012/01/08 v3154 L3 Experimental floating-point operations
\c_one_million=\count104
\c_one_hundred_million=\count105
\c_five_hundred_million=\count106
\c_one_thousand_million=\count107
\c_fp_pi_by_four_decimal_int=\count108
\c_fp_pi_by_four_extended_int=\count109
\c_fp_pi_decimal_int=\count110
\c_fp_pi_extended_int=\count111
\c_fp_two_pi_decimal_int=\count112
\c_fp_two_pi_extended_int=\count113
\l_fp_count_int=\count114
\l_fp_div_offset_int=\count115
\l_fp_exp_integer_int=\count116
\l_fp_exp_decimal_int=\count117
\l_fp_exp_extended_int=\count118
\l_fp_exp_exponent_int=\count119
\l_fp_input_a_sign_int=\count120
\l_fp_input_a_integer_int=\count121
\l_fp_input_a_decimal_int=\count122
\l_fp_input_a_exponent_int=\count123
\l_fp_input_b_sign_int=\count124
\l_fp_input_b_integer_int=\count125
\l_fp_input_b_decimal_int=\count126
\l_fp_input_b_exponent_int=\count127
\l_fp_input_a_extended_int=\count128
\l_fp_input_b_extended_int=\count129
\l_fp_mul_a_i_int=\count130
\l_fp_mul_a_ii_int=\count131
\l_fp_mul_a_iii_int=\count132
\l_fp_mul_a_iv_int=\count133
\l_fp_mul_a_v_int=\count134
\l_fp_mul_a_vi_int=\count135
\l_fp_mul_b_i_int=\count136
\l_fp_mul_b_ii_int=\count137
\l_fp_mul_b_iii_int=\count138
\l_fp_mul_b_iv_int=\count139
\l_fp_mul_b_v_int=\count140
\l_fp_mul_b_vi_int=\count141
\l_fp_mul_output_int=\count142
\l_fp_output_sign_int=\count143
\l_fp_output_integer_int=\count144
\l_fp_output_decimal_int=\count145
\l_fp_output_exponent_int=\count146
\l_fp_output_extended_int=\count147
\l_fp_round_position_int=\count148
\l_fp_round_target_int=\count149
\l_fp_split_sign_int=\count150
\l_fp_internal_int=\count151
\l_fp_trig_octant_int=\count152
\l_fp_trig_sign_int=\count153
\l_fp_trig_decimal_int=\count154
\l_fp_trig_extended_int=\count155
\l_fp_internal_dim=\dimen111
\l_fp_internal_skip=\skip48
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3box.sty"
Package: l3box 2012/01/09 v3158 L3 Experimental boxes
\l_tmpb_box=\box26
\l_box_top_dim=\dimen112
\l_box_bottom_dim=\dimen113
\l_box_left_dim=\dimen114
\l_box_right_dim=\dimen115
\l_box_top_new_dim=\dimen116
\l_box_bottom_new_dim=\dimen117
\l_box_left_new_dim=\dimen118
\l_box_right_new_dim=\dimen119
\l_box_internal_box=\box27
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3coffins.sty"
Package: l3coffins 2012/01/08 v3155 L3 Experimental coffin code layer
\l_coffin_internal_box=\box28
\l_coffin_internal_dim=\dimen120
\l_coffin_offset_x_dim=\dimen121
\l_coffin_offset_y_dim=\dimen122
\l_coffin_x_dim=\dimen123
\l_coffin_y_dim=\dimen124
\l_coffin_x_prime_dim=\dimen125
\l_coffin_y_prime_dim=\dimen126
\l_coffin_Depth_dim=\dimen127
\l_coffin_Height_dim=\dimen128
\l_coffin_TotalHeight_dim=\dimen129
\l_coffin_Width_dim=\dimen130
\c_empty_coffin=\box29
\l_coffin_aligned_coffin=\box30
\l_coffin_aligned_internal_coffin=\box31
\l_coffin_bounding_shift_dim=\dimen131
\l_coffin_left_corner_dim=\dimen132
\l_coffin_right_corner_dim=\dimen133
\l_coffin_bottom_corner_dim=\dimen134
\l_coffin_top_corner_dim=\dimen135
\l_coffin_scaled_total_height_dim=\dimen136
\l_coffin_scaled_width_dim=\dimen137
\l_coffin_display_coffin=\box32
\l_coffin_display_coord_coffin=\box33
\l_coffin_display_pole_coffin=\box34
\l_coffin_display_offset_dim=\dimen138
\l_coffin_display_x_dim=\dimen139
\l_coffin_display_y_dim=\dimen140
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3color.sty"
Package: l3color 2011/09/07 v2776 L3 Experimental colour support
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3kernel\l3luatex.sty"
Package: l3luatex 2012/01/09 v3158 L3 Experimental LuaTeX-specific functions
\g_cctab_allocate_int=\count156
\g_cctab_stack_int=\count157
))
("C:\Program Files\MiKTeX 2.9\tex\latex\l3packages\xparse\xparse.sty"
Package: xparse 2012/01/31 v3285 L3 Experimental document command parser
\l_xparse_current_arg_int=\count158
\l_xparse_m_args_int=\count159
\l_xparse_mandatory_args_int=\count160
\l_xparse_processor_int=\count161
\l_xparse_v_nesting_int=\count162
)
Package: l3keys2e 2012/01/31 v3285 LaTeX2e option processing using 
LaTeX3 keys
)
("C:\Program Files\MiKTeX 2.9\tex\latex\base\textcomp.sty"
Package: textcomp 2005/09/27 v1.99g Standard LaTeX package
Package textcomp Info: Sub-encoding information:
(textcomp)               5 = only ISO-Adobe without \textcurrency
(textcomp)               4 = 5 + \texteuro
(textcomp)               3 = 4 + \textohm
(textcomp)               2 = 3 + \textestimated + \textcurrency
(textcomp)               1 = TS1 - \textcircled - \t
(textcomp)               0 = TS1 (full)
(textcomp)             Font families with sub-encoding setting implement
(textcomp)             only a restricted character set as indicated.
(textcomp)             Family '?' is the default used for unknown fonts.
(textcomp)             See the documentation for details.
Package textcomp Info: Setting ? sub-encoding to TS1/1 on input line 71.

("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1enc.def"
File: ts1enc.def 2001/06/05 v3.0e (jk/car/fm) Standard LaTeX file
)
LaTeX Info: Redefining \oldstylenums on input line 266.
Package textcomp Info: Setting cmr sub-encoding to TS1/0 on input line 281.
Package textcomp Info: Setting cmss sub-encoding to TS1/0 on input line 282.
Package textcomp Info: Setting cmtt sub-encoding to TS1/0 on input line 283.
Package textcomp Info: Setting cmvtt sub-encoding to TS1/0 on input line 
284.
Package textcomp Info: Setting cmbr sub-encoding to TS1/0 on input line 285.
Package textcomp Info: Setting cmtl sub-encoding to TS1/0 on input line 286.
Package textcomp Info: Setting ccr sub-encoding to TS1/0 on input line 287.
Package textcomp Info: Setting ptm sub-encoding to TS1/4 on input line 288.
Package textcomp Info: Setting pcr sub-encoding to TS1/4 on input line 289.
Package textcomp Info: Setting phv sub-encoding to TS1/4 on input line 290.
Package textcomp Info: Setting ppl sub-encoding to TS1/3 on input line 291.
Package textcomp Info: Setting pag sub-encoding to TS1/4 on input line 292.
Package textcomp Info: Setting pbk sub-encoding to TS1/4 on input line 293.
Package textcomp Info: Setting pnc sub-encoding to TS1/4 on input line 294.
Package textcomp Info: Setting pzc sub-encoding to TS1/4 on input line 295.
Package textcomp Info: Setting bch sub-encoding to TS1/4 on input line 296.
Package textcomp Info: Setting put sub-encoding to TS1/5 on input line 297.
Package textcomp Info: Setting uag sub-encoding to TS1/5 on input line 298.
Package textcomp Info: Setting ugq sub-encoding to TS1/5 on input line 299.
Package textcomp Info: Setting ul8 sub-encoding to TS1/4 on input line 300.
Package textcomp Info: Setting ul9 sub-encoding to TS1/4 on input line 301.
Package textcomp Info: Setting augie sub-encoding to TS1/5 on input line 
302.
Package textcomp Info: Setting dayrom sub-encoding to TS1/3 on input 
line 303.
Package textcomp Info: Setting dayroms sub-encoding to TS1/3 on input 
line 304.

Package textcomp Info: Setting pxr sub-encoding to TS1/0 on input line 305.
Package textcomp Info: Setting pxss sub-encoding to TS1/0 on input line 306.
Package textcomp Info: Setting pxtt sub-encoding to TS1/0 on input line 307.
Package textcomp Info: Setting txr sub-encoding to TS1/0 on input line 308.
Package textcomp Info: Setting txss sub-encoding to TS1/0 on input line 309.
Package textcomp Info: Setting txtt sub-encoding to TS1/0 on input line 310.
Package textcomp Info: Setting lmr sub-encoding to TS1/0 on input line 311.
Package textcomp Info: Setting lmdh sub-encoding to TS1/0 on input line 312.
Package textcomp Info: Setting lmss sub-encoding to TS1/0 on input line 313.
Package textcomp Info: Setting lmssq sub-encoding to TS1/0 on input line 
314.
Package textcomp Info: Setting lmvtt sub-encoding to TS1/0 on input line 
315.
Package textcomp Info: Setting qhv sub-encoding to TS1/0 on input line 316.
Package textcomp Info: Setting qag sub-encoding to TS1/0 on input line 317.
Package textcomp Info: Setting qbk sub-encoding to TS1/0 on input line 318.
Package textcomp Info: Setting qcr sub-encoding to TS1/0 on input line 319.
Package textcomp Info: Setting qcs sub-encoding to TS1/0 on input line 320.
Package textcomp Info: Setting qpl sub-encoding to TS1/0 on input line 321.
Package textcomp Info: Setting qtm sub-encoding to TS1/0 on input line 322.
Package textcomp Info: Setting qzc sub-encoding to TS1/0 on input line 323.
Package textcomp Info: Setting qhvc sub-encoding to TS1/0 on input line 324.
Package textcomp Info: Setting futs sub-encoding to TS1/4 on input line 325.
Package textcomp Info: Setting futx sub-encoding to TS1/4 on input line 326.
Package textcomp Info: Setting futj sub-encoding to TS1/4 on input line 327.
Package textcomp Info: Setting hlh sub-encoding to TS1/3 on input line 328.
Package textcomp Info: Setting hls sub-encoding to TS1/3 on input line 329.
Package textcomp Info: Setting hlst sub-encoding to TS1/3 on input line 330.
Package textcomp Info: Setting hlct sub-encoding to TS1/5 on input line 331.
Package textcomp Info: Setting hlx sub-encoding to TS1/5 on input line 332.
Package textcomp Info: Setting hlce sub-encoding to TS1/5 on input line 333.
Package textcomp Info: Setting hlcn sub-encoding to TS1/5 on input line 334.
Package textcomp Info: Setting hlcw sub-encoding to TS1/5 on input line 335.
Package textcomp Info: Setting hlcf sub-encoding to TS1/5 on input line 336.
Package textcomp Info: Setting pplx sub-encoding to TS1/3 on input line 337.
Package textcomp Info: Setting pplj sub-encoding to TS1/3 on input line 338.
Package textcomp Info: Setting ptmx sub-encoding to TS1/4 on input line 339.
Package textcomp Info: Setting ptmj sub-encoding to TS1/4 on input line 340.
)
("C:\Program Files\MiKTeX 2.9\tex\latex\l3packages\xtemplate\xtemplate.sty"
Package: xtemplate 2012/01/31 v3285 L3 Experimental prototype document 
function
s
\l_xtemplate_tmp_dim=\dimen141
\l_xtemplate_tmp_int=\count163
\l_xtemplate_tmp_muskip=\muskip10
\l_xtemplate_tmp_skip=\skip49
Variant \prop_get:NoNTF already defined; not changing it on line 105
Variant \prop_get:NoNT already defined; not changing it on line 106
Variant \prop_get:NoNF already defined; not changing it on line 107
)
Package: xfrac 2011/10/09 v2896 L3 Experimental split-level fractions
\l_xfrac_slash_box=\box35
\l_xfrac_tmp_box=\box36
\l_xfrac_denominator_bot_sep_dim=\dimen142
\l_xfrac_numerator_bot_sep_dim=\dimen143
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\l_xfrac_slash_right_sep_dim=\dimen146
\l_xfrac_slash_left_muskip=\muskip11
\l_xfrac_slash_right_muskip=\muskip12
.................................................
. xtemplate info: "declare-object-type"
.
. Declaring object type 'xfrac' taking 3 argument(s) on line 96.
.................................................
.................................................
. LaTeX info: "xparse/define-command"
.
. Defining document command \sfrac with arg. spec. 'omom' on line 432.
.................................................
)
(c:\Users\jcsantos\Documents\temp\test.aux)
LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 3.
LaTeX Font Info:    ... okay on input line 3.
LaTeX Font Info:    Checking defaults for TS1/cmr/m/n on input line 3.
LaTeX Font Info:    Try loading font information for TS1+cmr on input 
line 3.

("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1cmr.fd"
File: ts1cmr.fd 1999/05/25 v2.5h Standard LaTeX font definitions
)
LaTeX Font Info:    ... okay on input line 3.

(C:\Users\Public\Documents\MiKTeX\tex\context\base\supp-pdf.mkii
[Loading MPS to PDF converter (version 2006.09.02).]
\scratchcounter=\count164
\scratchdimen=\dimen147
\scratchbox=\box37
\nofMPsegments=\count165
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\everyMPshowfont=\toks16
\MPscratchCnt=\count167
\MPscratchDim=\dimen148
\MPnumerator=\count168
\everyMPtoPDFconversion=\toks17
)
LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <7> on input line 4.
LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <5> on input line 4.
LaTeX Font Info:    Calculating math sizes for size <6.99997> on input 
line 4.

LaTeX Font Warning: Font shape `OT1/cmr/m/n' in size <3.49998> not available
(Font)              size <5> substituted on input line 4.

LaTeX Font Warning: Font shape `OML/cmm/m/it' in size <3.49998> not 
available
(Font)              size <5> substituted on input line 4.

LaTeX Font Warning: Font shape `OMS/cmsy/m/n' in size <3.49998> not 
available
(Font)              size <5> substituted on input line 4.

LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <6.99997> on input line 4.
LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <4.89995> on input line 4.
LaTeX Font Info:    External font `cmex10' loaded for size
(Font)              <3.49998> on input line 4.
! Missing number, treated as zero.
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Illegal unit of measure (pt inserted).
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)

! Missing number, treated as zero.
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Illegal unit of measure (pt inserted).
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)

! Missing number, treated as zero.
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Illegal unit of measure (pt inserted).
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)

! Missing number, treated as zero.
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Illegal unit of measure (pt inserted).
<to be read again>
                    \relax
l.4 $\sfrac{1}{2}
                  $
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)

[1

{C:/ProgramData/MiKTeX/2.9/pdftex/config/pdftex.map}]
(c:\Users\jcsantos\Documents\temp\test.aux)

LaTeX Font Warning: Size substitutions with differences
(Font)              up to 3.25002pt have occurred.

  )
Here is how much of TeX's memory you used:
  6699 strings out of 494049
  119347 string characters out of 3148475
  158361 words of memory out of 3000000
  9930 multiletter control sequences out of 15000+200000
  3640 words of font info for 14 fonts, out of 3000000 for 9000
  715 hyphenation exceptions out of 8191
  38i,12n,29p,316b,223s stack positions out of 
5000i,500n,10000p,200000b,50000s
<C:/Program Files/MiKTeX 
2.9/fonts/type1/public/amsfonts/cm/cmmi10.pfb><C:/Pr
ogram Files/MiKTeX 
2.9/fonts/type1/public/amsfonts/cm/cmr10.pfb><C:/Program Fil
es/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmr7.pfb>
Output written on test.pdf (1 page, 26643 bytes).
PDF statistics:
  18 PDF objects out of 1000 (max. 8388607)
  0 named destinations out of 1000 (max. 500000)
  1 words of extra memory for PDF output out of 10000 (max. 10000000)

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