# latex and pdftex hangs when compiling

I just updated my MiKTeX and now nor latex, neither pdflatex not compiling my tex. Even if it contains only

\begin{document}
\end{document}


No error messages are shown, no files are created. It just hangs.

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difficult to tell what is going on. Do you use a special class? maybe you downloaded miktex basic only and there are packages missing? If you use TenicCenter as editor, make sure you have "install missing packgaes on the fly" set to "yes" and not "ask me first" in the miktex settings. did you try compiling from the command line? –  Martin H Jun 12 '12 at 12:48
@MartinH It worked well about a hour ago. Now it doesn't work even in the command line. The only output I have is "C:\Users\efpies>pdflatex -synctex=1 -interaction=nonstopmode "D:\Dropbox\Publicuniversity\Diplom\report.tex" This is pdfTeX, Version 3.1415926-2.4-1.40.13 (MiKTeX 2.9)" –  efpies Jun 12 '12 at 12:52
Delete the temporary files like aux toc etc. (clean project). It is generally not a good idea to sync within drop box (afaik). I think I read something some time ago that this may cause file version problems due to the radiply changing file versions...This may not be true however, I never tested it myself. –  Martin H Jun 12 '12 at 12:57
I just updated on my netbook (winxp) and it works fine. But as the binaries have been updated the formats must be regenerated. Miktex triggers the format generation when you use pdflatex the first time. Perhaps this fails and so pdflatex hangs. Try to build the format through miktex settings to check if there are errors. –  Ulrike Fischer Jun 12 '12 at 13:38
There is on the tab "General" a button "update Formats" which will update all formats and there is a tab "Formats" with a button "build" which you can click as soon as you have choosen a format from the list. It will build a specific format. Use this for the first test. –  Ulrike Fischer Jun 12 '12 at 14:07

No. Before doing something drastic one should always have at least a vage idea what is the problem. If e.g. it is due to some broken exotic language file reinstalling everything will not help but the problem can be easily solved by removing the language from language.dat. –  Ulrike Fischer Jun 12 '12 at 14:14