BH schreef:
I really have no idea. We check all the standard locations for LaTeX installations, and I don't remember other reports of such problems. (Does anyone else experience this? If so, please give some details about your system and LaTeX installation ... and anything unusual you might have done.)
It turns out to be a somewhat outdated LaTeX installation. And me overlooking the red tick in the LyX installer. :-(
Regards, Walter