Unicode character <U+009C> (U+009C)

[Wolfgang Engelmann]

On 07.01.22 18:33, Tobias Hilbricht via lyx-users wrote:
> Am Freitag, dem 07.01.2022 um 14:32 +0100 schrieb Wolfgang Engelmann
> via lyx-users:
>> If I run the attached lyx file,I get an error:
>> Missing character: There is no œ (U+009C) in font
>> [LibertinusSerif-Regular.otf]
>>
>> show output anyway gives the attached pdf:
>>
>> nuclear ancient Ca2+
>> (Na+ /Ca2+ exchanger)
>> Ca 2+ homeostasis
>> �Ca2+ dependent kinase
>>
>> The exported luatex tex file was tested with this bash line
>> (oneline!,
>> thanks to people from the Linux User Group Tuebingen)
>>
>> grep -P "[\xc2\x9c]" A-07-C.tex | grep --color=auto -P
>> ".{0,2}[\xc2\x9c].{0,2}" > A.txt
>>
>> and tells
>>
>> %%Package inputenc Error: Unicode character œ (U+009C)
>> œ$\mathrm{Ca^{2+}}$ dependent kinase
>>
>> Could someone tell me, why in the first and the second line of the
>> pdf
>> file the Ca^2+ is shown correctly, whereas it is only shown correctly
>> if
>> I do not (3rd line) put it in mathrm (as done in the 4th line)
>>
>> I also wonder whether this square/cross in front of the 4th line can
>> be
>> searched for under lyx, since it seems to mark extended regular
>> expressions.
>>
>> Wolfgang
> 
> Wolfgang,
> 
> attached your formulas in a consistent look with mhchem. I called
> Libertinus fonts the LyX way via Document -> Settings -> Fonts: Use non
> TeX Fonts, then choosing Libertinus fonts in the drop down list.
> Libertinus Math is called by \setmathfont{Libertinus Math} in the LyX
> preamble.
> The error message is the result of the symbol set in front of the line
> 
> œ$\mathrm{Ca^{2+}}$ dependent kinase
> 
> Have you put this symbol just before the first $ on purpose? If so,
> what is it supposed to be?
> 
> Yours
> Tobias
> 
> 
again: thanks
no, this œ is the U+009C sign which should go out. How did you find it? 
special editor?
Wolfgang