I get "undefined control sequence" error message for several lines: "undefined control sequence" (after "\pagebreak", where I pressed ENTER for an empty line), "undefined control sequence \section", and "undefined control sequence \end{document}".

It is the first time that I installed TeXstudio on Windows 7. I also installed MiKTeX prior to TeXstudio. Moreover, I tried the code on Windows XP and didn't get the error messages at all.

The complete code is below.

\usetikzlibrary{decorations.pathmorphing, patterns,shapes}

\title{the title}
\date{March 4, 2014}



This is the main text.

  • Drop the use of \usepackage{preview}...
    – Werner
    Mar 5, 2014 at 7:28
  • Your document compiles without any complains from LaTeX under TexLive 2013 (Linux)
    – user31729
    Mar 5, 2014 at 8:43
  • What is the first error? Are you sure that you are running pdfLaTeX and not pdfTeX? Mar 5, 2014 at 19:03
  • @Werner Does anyone know why preview is causing problems here? Mar 7, 2014 at 8:18

1 Answer 1


The following minimal example replicates the problem:



This is the main text.


It's obviously a bad interaction (incompatibility) between tikz and preview. Either drop the loading of preview, or load it with the [active] package option.

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