Geoffrey Lloyd schrieb:
Ok the debug window clearly shows an error
It says
Failed: gswin32c.exe 0lyxpreview.ps
Thanks Geoffrey for your investigation. I also get this error with some
documents that use complicated math constructs (for example if I load my
math-documentation
http://wiki.lyx.org/uploads/LyX/LyXMathebefehle/LyXMathebefehle.lyx )
The problem is a bug in the Ghostscript version (8.15) that is used
internally by MiKTeX.
Does Instant preview work when you create a new document (without
preamble stuff) with simple formulas like:
A=B
regards Uwe
