Hello, I am a somewhat experienced Lyx user. Using Lyx 1.4.2. with the latest MiKTeX (2.5 with updated packages from the 14.august.2006) on Windows xp. I have reconfigured Lyx via the Menu (Tools -> reconfigure) after all MiKTeX updates. I don't know much about plain LaTeX though (thats why I use Lyx ;-))
Recently I have an annoying problem with a lyx document class (g-brief-de). Whenever I try to export documents of this type to PDF via pdflatex I get the following error: LaTex Error: Command \Telefon already defined. \newcommand\Telefon{\mvchr{84}} Your command was ignored. Type I <command> <return> to replace it with another command, or <return> to continue without it. At first I thought that there is something wrong with my document. So I tried the g-brief-de.lyx template file from the Lyx templates folder. It produces the same error! I tried an uninstall of Lyx 1.4.2 and reinstalled 1.4.1 (with 1.4.1 it used to work). But then it wouldn't even work in 1.4.1.! Now I have 1.4.2 up and running but the error persists! Is this error reproducible by anyone? What causes the error? If it is not reproducible, what am I doing wrong with my lyx installation? Please help me. I have lots of old documents using this class. Also I like the layout more than the g-brief2 class. Thank you very much, Stephan