Hello Jürgen,
> Your file compiles fine here. This is with most recent TL 2012 and LyX > 2.0.6dev. Maybe some of your packages are outdated. The versions are printed > to the log file if you enter \listfiles into the preamble. Here's mine: I am using the most recent packages (lyx, latex, ...) distributed with Fedora-17-updates: *File List* memoir.cls 2005/09/25 v1.618 configurable document class mem10.clo 2002/07/27 v0.2 memoir class 10pt size option mempatch.sty 2007/01/22 v4.8 Patches for memoir class v1.618 fontenc.sty t1enc.def 2005/09/27 v1.99g Standard LaTeX file inputenc.sty 2006/05/05 v1.1b Input encoding file latin9.def 2006/05/05 v1.1b Input encoding file float.sty 2001/11/08 v1.3d Float enhancements (AL) amsthm.sty 2004/08/06 v2.20 amsmath.sty 2000/07/18 v2.13 AMS math features amstext.sty 2000/06/29 v2.01 amsgen.sty 1999/11/30 v2.0 amsbsy.sty 1999/11/29 v1.2d amsopn.sty 1999/12/14 v2.01 operator names which seem to be *really* outdated, compared to the package-versions you list. Does this mean I manually have to update my latex installation? Is there any way you can recommend, without re-compiling my whole software-stack? The whole situation is a bit sad, as I am sitting behind a ~100kBit/s GPRS line :/ Thx, Reggi