Mukhtar Ullah wrote: > Do you think it has anything to do with the version of perl? I have perl > 5.12 64 bit on on Windows 7 64bit.
It probably has something to do with the version of biber. The most recent is 0.9.5. The workaround Thomas mentions points to a "bug" in biber that has been resolved in version 0.9.1 (actually, it's not really a bug, but the omission of an information LyX relies on), see for details: http://sourceforge.net/projects/biblatex- biber/forums/forum/824416/topic/4506878 Jürgen