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After upgrading to MiKTeX 2.9 my beamer files stopped working. The code:

\documentclass{beamer} 
\begin{document} 
\begin{frame} 
Hello 
\end{frame} 
\end{document}

Gives some 20 errors and two warnings, the first error being:

! Undefined control sequence.
<argument> ...eamer@linkspace {6pt}\Hy@xspace@end 
                             \Hy@LinkMath \Hy@SaveSpace...

and the first warning:

LaTeX Font Warning: Font shape `OT1/cmss/m/n' in size <4> not available
(Font)              size <5> substituted on input line 3.

The log file is available here.

I have searched the web in vain, for example tried deleting the .aux file as suggested at Beamer - undefined control sequence, the solutions did not work.

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Seems to be an issue with the hyperref package which is loaded by beamer. –  Martin Scharrer Apr 14 '11 at 14:57
    
Welcome to TeX.sx! +1 for a first question that you obviously put some thought into before posting; we'd love to see more of those questions! –  doncherry Sep 8 '11 at 16:27

1 Answer 1

update the package hyperref. If it is not available with MiKTeX (for TeXLive it was updated yesterday) try in the preamble:

\makeatletter\def\Hy@xspace@end{}\makeatother
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1  
\makeatletter\def\Hy@xspace@end{}\makeatother –  Ulrike Fischer Apr 14 '11 at 15:02
    
... that is true –  Herbert Apr 14 '11 at 15:03
    
The \makeatletter\def\Hy@xspace@end{}\makeatother did work! Thank you!! Updating the hyperref and \def\Hy@xspace@end{} did not work, but the newest update of hyperref that I could find was from 14. of april (not yesterday). –  Hafrún Hauksdóttir Apr 14 '11 at 15:57

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