lyx file from 2015 not converted to pdf

[Wolfgang Engelmann]

Am 19.03.20 um 22:20 schrieb Guenter Milde:
> On 2020-03-19, Richard Kimberly Heck wrote:
>> On 3/19/20 12:20 PM, Paul A. Rubin wrote:
>>> On 3/19/20 12:03 PM, Wolfgang Engelmann wrote:
>>>> I am trying to export from a lyx file produced in 2015 a pdf file,
>>>> but get this error:
> 
> ...
> 
>>>> further errors:
>>>> Error 84 returned from iconv when converting from UCS-4LE to
>>>> ISO-8859-15: Ungültiges oder unvollständiges Multi-Byte- oder
>>>> Wide-Zeichen
> 
> This seems to indicate that there is an invalid utf8 multi-byte character
> somewhere in the *.lyx file.
> 
>>>> How should I proceed?
>>> The last message (error 84) suggests that there may be a problem with
>>> character encoding. If it is in a preview snipped, that could explain
>>> the preceding message.
> 
>>> You can try to isolate the problematic portion of the document by
>>> bisection. Once you know where the problem is, we may be able to offer
>>> more specific advise.
> 
>> It's weird that you'd see the problem now and not in 2015.  As Paul
>> suggests, this is a problem with one of the characters in the document:
>> We're trying to convert it to the right encoding and that's failing.
>> LyX should not crash when that happens, but sometimes it does.
> 
> It may be due to a lyx2lyx problem, some mistake when converting the
> document from an old lyx format to the current one.
> 
> Keep the original file, and from a copy remove parts until it compiles.
> 
> Günter
> 
> 
Thanks all for suggestions.
The file did compile in 2015.
I tried to remove parts of the original.
It turned out that a nomenclature lead to the error

However, I can't find any mistake in it (and as said before, it compiled 
in 2015) >
VVD
VIVID is a small flavin-binding blue-light photoreceptor and consists of 
a LOV domain and an N-terminal cap

I put it in a lyx Note and the part converted.

Than I found an other nomenclature causing trouble.

removed it, but now a nomenclature which went through alright before was 
causing troubles.

I gave up after spending hours.

Questions:
If I remove the nomenclature after bibtex and index at the end of the 
document, that does apparently not prevent the nomenclatures in the text 
to be neglected during compiling, since lyx clashes. This is in contrast 
to the bibtex produced references, which, if removed, prevents clashes 
if references are giving troubles. I.e. I have to remove (or put in Lyx 
notes) the nomenclatures. Perhaps I should work with a latex file, where 
I could remove the nomenclatures more easily with a text editor (or use 
the lyx file with an editor).
For the time being I have to recover - otherwise I might get the corona
Cheers,
Wolfgng







VVD
VIVID is a small flavin-binding blue-light photoreceptor and consists of 
a LOV domain and an N-terminal cap