Thanks, that did the trick. I assume that the setting of the default rendering engine was important, obviously it is always the last setting one doesn’t try that fixes things.
-- Respectfully, Robert Susmilch =============== The "gobbledygook" in this email is due to this email having been "signed" with PGP for security. On Sunday, January 31, 2016 09:41:04 AM Jürgen Spitzmüller wrote: > Am Samstag, den 30.01.2016, 22:50 -0600 schrieb Robert Susmilch: > > Dear List, > > > > I am attempting to track down lack of instant preview for math > > equations. It > > seemed to be a random event between different files not working. I > > chalked it > > up to random incompatibilities between all the various classes and > > preambles, > > etc. However, even a new document doesn’t seem to work with a basic > > equation. > > I have looked into the tmp directory, and found that the previews are > > not > > generated because: > > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > > ! > > ! Fatal fontspec error: "cannot-use-pdftex" > > ! > > ! The fontspec package requires either XeTeX or LuaTeX to function. > > ! > > ! You must change your typesetting engine to, e.g., "xelatex" or > > "lualatex" > > ! instead of plain "latex" or "pdflatex". > > ! > > ! See the fontspec documentation for further information. > > ! > > ! For immediate help type H <return>. > > !............................................... > > Switch on "Use non-TeX fonts" in Document > Settings > Fonts. This > should cause LyX to use XeTeX for preview generation. > > Jürgen
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