On 2012-06-20, Jakob Neitzel wrote: > I am having a problem that seems to have been around in different versions > for a while. However, I have not been able to get lyx running even after > searching through the mailing list archives. > For example this : > http://comments.gmane.org/gmane.editors.lyx.general/64576
> I installed Lyx 2.0.3 and Miktex 2.9 on a Windows 7 system today and every > time I open a document I get the error message: > "The selected document class ...... requires external files that are not > available. The class can be used, but not compiled until following > prerequisites are installed: ... .cls . See Section Class Availability of > the User's Guide for more information" If this message appears for any of the standard documentclasses (article, book, report), it shows a general problem with your setup. * Try to create a simple sample document, * export to latex (File>Export>pdflatex) * compile from the command line (DOS box): pdflatex example.tex If this works, latex works but LyX does not know. Reconfigure LyX and write again if this does not help. If pdflatex fails, write the error message(s). If this message appears for "exotic" documentclasses only, you may have a partial lyx installation. MikTeX can, AFAIK, auto-install required packages, so this may be a warning you can ignore. Günter
