Hi,
I have two files. The first one I wrote with LyX 1.6.7. Then I installed
LyX 2.0. I copied the file to a USB-stick. Suddenly I got always 4
errors
"Undefined control sequence."
for example with the description
"ist $\unit[1]{\lyxmathsym{\textdegree}C}
$ gleich $\unit[1]{K}$.
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined."
That was not useful. I tried a lot of things. Once I succeeded to reduce
the error by one.
The last trial was to copy the text, to make a new file and to paste the
text. I did the same with all the options and settings. At least I had a
manually copied file. And...
It worked. No errors, no complains.
I think LyX does not delete all the code if one changes some settings.
lg,
Karl