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Dear Stefan,

I have restarted the program, and it's working. Thank you for your help!

Bálint

Dear Stefan,

I checked the named issue, and I clicked on "Refresh FNDB", but it didn't solve the problem, the compiler does the very same thing, and the .log file is truncated, again.

I can build other files but beamer.

Dear All,
I have installed the package beamer, but it simply doesn't work.
Here is a very simple tex file:
\documentclass{beamer}

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

As a result of compilation, 0 errors, 0 warnings and 0 pages of pdf is created.
Could anybody help me ...