I am using MiKTeX 2.9 on Windows 7.

I'm getting the error: "can't write on pdf file." The pdf doesn't reflect what I wrote. What did I do wrong?

My input:


\textheight=8.5in\textwidth=6.6 in \baselineskip=18pt \parskip=6pt

\begin{document}  % added, was missing


\newpage \baselineskip=12pt



closed as too localized by Joseph Wright Oct 22 '12 at 7:39

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  • You're missing a \begin{document}. I'm guessing the log file will state this clearly or your editor. – pythonista Oct 19 '12 at 20:38
  • No, I have: \oddsidemargin=1.0in\evensidemargin=0.in \textheight=8.5in\textwidth=6.6 in \baselineskip=18pt \parskip=6pt %opening \title{Title} \author{Author} \begin{document} \maketitle \begin{abstract} – user21127 Oct 19 '12 at 20:40
  • I can't see what you posted in the comment in the actual question. – pythonista Oct 19 '12 at 20:43
  • 5
    This can happen when the output PDF file is locked by another application, e.g. it is open in Adobe Reader. – cyberSingularity Oct 19 '12 at 20:54
  • You were right. The error was caused by the pdf already being open. Closing it fixed the problem. Thanks! – user21127 Oct 19 '12 at 21:07

The error message is generated by the prompt_file_name procedure in TeX.

Most likely causes:

A couple of things to note:

  • One cannot type x at this prompt to abort. That will write on a file called x.pdf.
  • In pdflatex, pressing ENTER without retyping the filename unhelpfully writes on a file called .pdf.
  • In lualatex, pressing ENTER without retyping the filename prompts again.
  • In xelatex, this prompt doesn't occur. Instead, one seems to get the message ** ERROR ** Unable to open ... and then it exits.
  • I've deleted the pdf and it worked. Thank you – CroCo Jul 1 '15 at 20:01

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