Here's the problem I've been having: in any lyx file which contains (in mathmode) a fraction or a sub or superscript, both View > pdflatex and File > Print produce an error message. (LyX/Mac, LyX 1.3.4, Mac 10.3.4) Ronald Florence has been very helpful, and he suggested that I read the help files on the use of -dbg and then start lyx from the command line with the appropriate debug parameter.
But I'm a tabla rasa as far as unix is concerned. And the LyX help files
say almost nothing about -dbg, unless I've missed a section. And what is
the appropriate debug parameter? Can someone spell out exactly what I
need to do to follow Ronald's suggestion? Do I do whatever I do right
after I have gotten LyX to produce a print or preview error message? I
do at least know how to get to the Terminal on the Mac, and Ronald's
HOWTO LyX/Mac page says for debugging that I can start LyX from the
command line with /Applications/LyX.app/Contents/MacOS/LyX.
At the terminal prompt type "/Applications/LyX.app/Contents/MacOS/LyX -dbg" This will give you a list of debug options
To see all debugging messages use "/Applications/LyX.app/Contents/MacOS/LyX -dbg any"
When you perform the action that is producing the error, then you will hopefully see some helpful messages in the terminal window.
I think that the dbg approach may be a bit deeper than you need.
Some other things to try...
1. What is the error message you get?
2. Do you get the proper output when you use just View > pdf?
3. Export the file as latex and then run "pdflatex myfilename" in terminal and see if there are any errors?
