[Tex/LaTex] Inputenc error in bibtex during pdf output

jabreflyx

I'm not very good with tex stuff, and although I'm a capable linux user, latex has always been a problem for me.

My situation.
I'm writing a thesis document.
OS : Debian 8
Lyx : 2.1.2
Jabref : 2.1

When I try to output my Lyx file to PDF just today I have been getting the following error message about inputenc

Package natbib Warning: Citation `ArpaciDusseau14' on page 12
undefined on inpu t line 244.

[12] [13]) [14] (./Memoire_Stage.bbl (./Memoire_Stage.brf)
\tf@brf=\write4 \openout4 = `Memoire_Stage.brf'.

! Package inputenc Error: Keyboard character used is undefined
(inputenc) in inputencoding `latin9'.

See the inputenc package documentation for explanation. Type H
for immediate help. …
                                               l.79 
  You need to provide a definition with \DeclareInputText  or \DeclareInputMath before using this key.
! Package inputenc Error: Keyboard character used is undefined
(inputenc) in inputencoding `latin9'.

See the inputenc package documentation for explanation. Type H
for immediate help. …
                                               l.79

Recent changes are :

I've been using Zotero, and exported a number of my references to bibtex output and then imported them into jabref.

It is not the first time I have done this, previously everything has been fine.

I also recently split my thesis into a multi-document format (it was getting too long to be able to find my way around !), but again my output to pdf has been working up until today.

When I output to pdf from lyx the first window that opens has the following details in it.

Package inputenc Error: Keyboard character used is undefined You need
to provide a definition with \DeclareInputText or \DeclareInputMath
before using this key.

But I don't know how to find these 'strange' characters.
The jabref DB is set to be utf8 format.
I found and deleted the .blg and .blf files (and in fact all the lyx temp files just in case), but no change.

I did perform a copy and paste from a my personal tiddlywiki web note book, but this hasn't caused my problems before.

I've pulled an old version off of my git repo, and it will compile to pdf just fine, but the references I have used are much reduced (I used markers in the doc to mark where my missing references where)

I don't know where to go next to try to solve my problem.

all help is greately appreciated.

David

Best Answer

Make sure that your bibliography and document are using UTF-8 and then declare

\usepackage[utf8]{inputenc}

rather than [latin9].

For UTF-8 Bibliographies you might need bibtex8 or biblatex/biber depending on exactly how much language support you need. (Non English titles etc are not a problem but classic bibtex will not understand non ascii letters so for example if you are using a style that sorts author names, sort order is likely to be wrong if you have names with accented or other non ascii characters).

For modifying the your lyx document to a different langage coding do the following in the menu :

Document -> Settings -> Select the 'langage' options.

Here you can modify the actual default written language for the spell checker. Also you can modify the language encoding. Default is apparently latin-9 (see this wiki article about latin-9 / iso-8859-15. Simply modify it to the 'other' option ans selection of utf8 should solve your problems.

NOTE : I don't know how this will handle the use of split documents (I guess it should pull the utf8 setting from the master).

The alternative is to place the declaration

\usepackage[utf8]{inputenc}

in the preamble (also available as the last option in the settings window) - although as of yet I've not tested this option.

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[Tex/LaTex] Using the xr package in LyX (for cross-referencing an external LyX document)

I have been trying to get xr and xcite working for past couple days in LyX and this post and the links it cites were about all I could find as references. Since the current answer doesn't fully explain what is going on in LyX, I'll give what works for me for using xr (or xcite) with LyX:

Put
```
\usepackage{xr}
\externaldocument{referenced}
```
into the LaTeX preamble in Document->Settings of the referencing document (I will call it referencing.lyx).
Build the referenced document to obtain referenced.aux.

You can either do File->Export to export referenced.tex and run latex on it to generate referenced.aux or you build the document normally in LyX with the View command. If you use the View command, you will need to find LyX's temporary directory where it ran latex. This directory should be a subdirectory of the Temporary directory listed under the Paths section of LyX's Preferences. The LyX subdirectories (there might be more than one depending on how many document you have opened and rendered during the session) will have names starting with lyx_tmpdir and will contain subdirectories with names beginning with lyx_tmpbuf. One of these lyx_tmpbuf directories should contain referenced.aux (if you start a new LyX session and View referenced.lyx, it should be easy to find since there shouldn't be a lot of extra LyX directories). (Itai, LyX's temporary directory is usually located in a system temporary directory that does not show up in typical file searches, so that might be why you could not find any .aux files).
Once you have referenced.aux, just save it in the same directory as referencing.lyx and LyX should find it when it renders referencing.pdf.

Other usage notes:

LyX does not have native support for xr or xcite. Initially, the labels in referenced.lyx will not appear as options in the cross-reference dialog in LyX. To reference items from referenced.lyx such as referenced_label1, you can either do "Insert->TeX Code" and put \ref{referenced_label1} in by hand, or you can keep referenced.lyx open, right-click on the label you want to reference and choose "Copy as reference", and then paste into referencing.lyx at the point where you want to make the reference.
Because LyX does not have support for xr, pasted labels will show up in LyX with a BROKEN: prefixed in front of the label. However, they should still be rendered properly in the pdf that is produced. The BROKEN: prefix just means that LyX can't find that label defined within referencing.lyx. One way to get around this is to put referencing.lyx as a child document (Insert -> File -> Child Document) within a LyX note. Then its labels will show in the cross-reference dialog in LyX, but because the inclusion is within a LyX note, it won't get rendered in the .pdf.
Pasted labels will appear in LyX's cross-reference dialog (as BROKEN: references). Don't try to reference them from there though because you end up with a reference to a reference.
With xcite, if you have a separate .bib file for referenced.lyx (call it referenced.bib), you can add referenced.bib to referencing.lyx's bibliography and cite the items normally (rather than copying and pasting references out of referenced.lyx). Then, when you want to render the referencing.pdf, remove referenced.bib from the bibliography. This should break all of the citations within referencing.lyx but they should still be found by xcite.
While searching for how to use xr with LyX, I saw references to a combo document option in LyX that would allow it to use the same temporary directory for two LyX files (in which case referenced.aux file could be made available to referencing.lyx without having to put it in the working directory as described above). As far as I can tell, this feature was removed before LyX 2.0 and is not an option any more.

[Tex/LaTex] Output pdf file shows empty references after inserting BibTeX in Lyx 2.0.5

You have run into this 7 year old bug that will be fixed for LyX 2.1 (beta to be released soon). bibtex is probably trying to tell you what's wrong but LyX is not passing that information on. To see the bibtex log, export to LaTeX (pdflatex) and compile manually with pdflatex and bibtex. If you don't understand the error, post it here. And yes, similar to what Papiro says, please post a LyX minimal example.

EDIT: note that the bug was not fixed for LyX 2.1. It was viewed as too intrusive of a change. Many users had documents were compiling and were upset when suddenly they received errors. See the ticket (click on "this" above) for more information.

Best Answer

Related Solutions

[Tex/LaTex] Using the xr package in LyX (for cross-referencing an external LyX document)

[Tex/LaTex] Output pdf file shows empty references after inserting BibTeX in Lyx 2.0.5

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