ERROR :

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H   for immediate help.
 ...                                              
                                                  
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SOLUTION:
Con­vert all doc­u­ment to ANSI ( style, doku­ment .… ), if you use 

\usepackage[cp1250]{inputenc}%

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