There is an Error in the german help-document
"Das LyX-Handbuch der Einfügungen"
in lyx version 1.6.0. It does not convert to any format.
The error message is as follows
Fehler: LaTeX Error: Command \textpi unavailable in encodung T1.
Beschreibung:
\marginpar
{Dies ist eine Randnotiz.%
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.
Regards