[texhax] pst-barcode with pdflatex

[Reinhard Kotucha]

On 2011-03-24 at 07:11:05 +0100, Herbert Voss wrote:

 > Am 23.03.2011 16:25, schrieb Reynolds Carl (ROYAL FREE HAMPSTEAD NHS TRUST):
 > > Hi, I'm trying to build this QR code example:
 > >
 > > \documentclass{article}
 > > \usepackage{pst-barcode}
 > > \begin{document}
 > >    \begin{pspicture}(1in,1in)
 > >      \psbarcode{test string}{}{qrcode}
 > >    \end{pspicture}
 > > \end{document}
 > >
 > > I get this error:
 > >
 > > ! Undefined control sequence.
 > > <recently read>  \c at lor@to at ps
 > 
 > you can not run it directly with pdflatex. Use
 > 
 > \documentclass{article}
 > \usepackage{pst-barcode}
 > \usepackage{auto-pst-pdf}
 > ...
 > 
 > and then "pdflatex -shell-escape <file>" and it should work.

Can't PS Tricks check \AtBeginDocument whether it's run under pdftex
and provide a more specific error message when auto-pst-pdf is not
loaded?

Regards,
  Reinhard

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