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! LaTeX Error: Two \documentclass or \documentstyle commands.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.1 \documentclass{
                   article}
The document may only declare one class.

Overfull \hbox (3.30536pt too wide) in paragraph at lines 41--42
[]\T1/lmr/m/n/10 (Markdown ex-am-ple text adapted from $\T1/lmtt/m/n/10 http : 
/ / www . unexpected-[]vortices .
 []

! You can't use `macro parameter character #' in vertical mode.
l.73 #
      . first item
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in horizontal mode.
l.74 #
      . second item
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in horizontal mode.
l.75 #
      . third item
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in vertical mode.
l.79     #
           Let me re-iterate ...
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in horizontal mode.
l.87 #
       Let me re-iterate ...
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in vertical mode.
l.92 #
      ## An h3 header ###
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in vertical mode.
l.92 ##
       # An h3 header ###
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in vertical mode.
l.92 ###
         An h3 header ###
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in horizontal mode.
l.92 ### An h3 header #
                       ##
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in horizontal mode.
l.92 ### An h3 header ##
                        #
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! You can't use `macro parameter character #' in horizontal mode.
l.92 ### An h3 header ###
                         
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

! Missing $ inserted.
<inserted text> 
                $
l.117 ...to [a website](http://foo.bar).  And now^
                                                  [with `markdown` v2.4] you...
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

! Missing $ inserted.
<inserted text> 
                $
l.118 
      
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.


Overfull \hbox (231.20518pt too wide) in paragraph at lines 117--118
[]\T1/lmr/m/n/10 Here's a link to [a web-site](http://foo.bar). And now$[]\OML/
lmm/m/it/10 with\OT1/lmr/m/n/10 `\OML/lmm/m/it/10 markdown\OT1/lmr/m/n/10 `\OML
/lmm/m/it/10 v\OT1/lmr/m/n/10 2\OML/lmm/m/it/10 :\OT1/lmr/m/n/10 4]\OML/lmm/m/i
t/10 youcanalsouseinlinedfootnoteswith\OT1/lmr/m/n/10 `\OML/lmm/m/it/10 inlineF
ootnotes\OT1/lmr/m/n/10 `\OML/lmm/m/it/10 :$ 
 []


LaTeX Warning: Reference `fig:exampleimage' on page 1 undefined on input line 1
33.

[1

{C:/Users/LocalAdmin/AppData/Local/MiKTeX/2.9/pdftex/config/pdftex.map}]
No file Markdown.bbl.
[2] (Markdown.aux)

LaTeX Warning: There were undefined references.


LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.

 ) ) ) 
Here is how much of TeX's memory you used:
 4175 strings out of 492969
 75578 string characters out of 3135831
 132524 words of memory out of 3000000
 7971 multiletter control sequences out of 15000+200000
 45148 words of font info for 43 fonts, out of 3000000 for 9000
 1141 hyphenation exceptions out of 8191
 49i,4n,48p,814b,212s stack positions out of 5000i,500n,10000p,200000b,50000s
{C:/Program Files/MiKTeX 2.9/fonts/enc/dvips/lm/lm-mathex.enc}{C:/Program
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ts/enc/dvips/lm/lm-rm.enc}{C:/Program Files/MiKTeX 2.9/fonts/enc/dvips/lm/lm-ma
thit.enc}<C:/Program Files/MiKTeX 2.9/fonts/type1/public/lm/lmbx10.pfb><C:/Prog
ram Files/MiKTeX 2.9/fonts/type1/public/lm/lmex10.pfb><C:/Program Files/MiKTeX 
2.9/fonts/type1/public/lm/lmmi10.pfb><C:/Program Files/MiKTeX 2.9/fonts/type1/p
ublic/lm/lmr10.pfb><C:/Program Files/MiKTeX 2.9/fonts/type1/public/lm/lmr12.pfb
><C:/Program Files/MiKTeX 2.9/fonts/type1/public/lm/lmr17.pfb><C:/Program Files
/MiKTeX 2.9/fonts/type1/public/lm/lmr7.pfb><C:/Program Files/MiKTeX 2.9/fonts/t
ype1/public/lm/lmtt10.pfb>
Output written on Markdown.pdf (2 pages, 154724 bytes).
PDF statistics:
 49 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)

\documentclass{article}

\usepackage{markdown}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}

\begin{document}
(Markdown example text adapted from \url{http://www.unexpected-vortices.com/sw/rippledoc/quick-markdown-example.html})

\begin{markdown}
An h1 header
============

Paragraphs are separated by a blank line. 

2nd paragraph. *Italic*, **bold**, and `monospace`. Itemized lists
look like:

* this one
* that one
* the other one

> Block quotes are
> written like so.
>
> They can span multiple paragraphs,
> if you like.

Use 3 dashes for an em-dash. Use 2 dashes for ranges (ex., "it's all
in chapters 12--14"). Three dots ... will be converted to an ellipsis (only if you enable the `smartEllipses` option).

# Another h1

Lorem ipsum dolor.

## H2

Sit amet.
\end{markdown}
\end{document}

pdflatex --shell-escape mdtest

lualatex mdtest

This is pdfTeX, Version 3.14159265-2.6-1.40.19 (MiKTeX 2.9.6880 64-bit) (preloaded format=pdflatex 2018.11.22)  18 MAR 2019 15:06
entering extended mode
**./Markdown.tex
(Markdown.tex
LaTeX2e <2018-04-01> patch level 5
("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls"
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo"
File: size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
)
\c@part=\count80
\c@section=\count81
\c@subsection=\count82
\c@subsubsection=\count83
\c@paragraph=\count84
\c@subparagraph=\count85
\c@figure=\count86
\c@table=\count87
\abovecaptionskip=\skip41
\belowcaptionskip=\skip42
\bibindent=\dimen102
)
(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\latex\markdown\markdown.sty
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\keyval.sty"
Package: keyval 2014/10/28 v1.15 key=value parser (DPC)
\KV@toks@=\toks14
)
(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\latex\url\url.sty
\Urlmuskip=\muskip10
Package: url 2013/09/16  ver 3.4  Verb mode for urls, etc.
)
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\graphicx.sty"
Package: graphicx 2017/06/01 v1.1a Enhanced LaTeX Graphics (DPC,SPQR)

("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\graphics.sty"
Package: graphics 2017/06/25 v1.2c Standard LaTeX Graphics (DPC,SPQR)

("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\trig.sty"
Package: trig 2016/01/03 v1.10 sin cos tan (DPC)
)
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics-cfg\graphics.cfg"
File: graphics.cfg 2016/06/04 v1.11 sample graphics configuration
)
Package graphics Info: Driver file: pdftex.def on input line 99.

("C:\Program Files\MiKTeX 2.9\tex\latex\graphics-def\pdftex.def"
File: pdftex.def 2018/01/08 v1.0l Graphics/color driver for pdftex
))
\Gin@req@height=\dimen103
\Gin@req@width=\dimen104
)
("C:\Program Files\MiKTeX 2.9\tex\latex\base\ifthen.sty"
Package: ifthen 2014/09/29 v1.1c Standard LaTeX ifthen package (DPC)
)
(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\latex\fancyvrb\fancyvrb.sty
Package: fancyvrb 2019/01/15
Style option: `fancyvrb' v3.2a <2019/01/15> (tvz)
\FV@CodeLineNo=\count88
\FV@InFile=\read1
\FV@TabBox=\box26
\c@FancyVerbLine=\count89
\FV@StepNumber=\count90
\FV@OutFile=\write3
)
(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\latex\csvsimple\csvsimple.s
ty
Package: csvsimple 2016/07/01 version 1.20 LaTeX CSV file processing

(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\latex\pgf\utilities\pgfkeys
.sty
(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\generic\pgf\utilities\pgfke
ys.code.tex
\pgfkeys@pathtoks=\toks15
\pgfkeys@temptoks=\toks16

(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\generic\pgf\utilities\pgfke
ysfiltered.code.tex
\pgfkeys@tmptoks=\toks17
)))
(C:\Users\LocalAdmin\AppData\Roaming\MiKTeX\2.9\tex\latex\etoolbox\etoolbox.sty
Package: etoolbox 2018/08/19 v2.5f e-TeX tools for LaTeX (JAW)
\etb@tempcnta=\count91
) ("C:\Program Files\MiKTeX 2.9\tex\latex\tools\shellesc.sty"
Package: shellesc 2016/06/07 v0.02a unified shell escape interface for LaTeX
Package shellesc Info: Unrestricted shell escape enabled on input line 67.
)
\csv@file=\read2
\c@csvinputline=\count92
\c@csvrow=\count93
\c@csvcol=\count94
\csv@out=\write4
) (markdown.tex

! LaTeX Error: Two \documentclass or \documentstyle commands.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.1 \documentclass{
                   article}
? H
The document may only declare one class.
?