LyX ⇒ LyX error message concerning the LaTeX preamble

[ebop]

LyX 2.2, MikTeX 2.9 updated today, Windows 7 32 bit

I'm working on a book. Compilation never failed up to now. Suddenly error messages concerning the LaTeX preamble appeared (see attachment) although I haven't changed anything in the preamble.

Error message when using XeTeX

XeTeX-Error.png (27.48 KiB) Viewed 5392 times

Error message when using LuaTeX

LuaTeX-Error.png (26.5 KiB) Viewed 5392 times

The document doesn't compile at all and throws tons of error messages. It seems LaTeX suddenly doesn't know special characters like ä, ö, ü etc. any more. I checked the coding of all files - they are UTF-8 or UTF-8 without BOM without any exception.

What do you need to help (the whole document, preamble only, ...)?

[scottkosty]

I'm hoping you have backups? If so, just look at the differences between the last backup that worked and the file now. Figure out which change caused the problems.

[Stefan Kottwitz]

"Updated today"? Oh.

Also I hope you have backups. I make copies of versions all the time when I write a book or longer documents. Make a copy of all your documents before trying something else. For example: a PDF copy may still give you the content back if the .lyx file would be destroyed, but another compilation could replace that PDF.

I suggest also to look at the affected .lyx file with a simple text editor, as it should be readable text.

You could post your .lyx file and additonally a pdfLaTeX export file here in the forum, as attachment to a post. (To protect the data, you could remove this attachment later on, or I can do for you)

Stefan

[ebop]

I'm hoping you have backups? If so, just look at the differences between the last backup that worked and the file now. Figure out which change caused the problems.

No, I have no backup. I tried to use the versioning system of LyX, but it failed.

The file I talked about didn't change at least for several weeks. That means: The identical document once compiled and for unknown reasons suddenly didn't...

[ebop]

...

You could post your .lyx file and additonally a pdfLaTeX export file here in the forum, as attachment to a post. (To protect the data, you could remove this attachment later on, or I can do for you)

Stefan

I've attached the master document of my book and the .tex-export in the LuaTeX-, XeTeX-, PDFLaTeX and normal LaTeX-version.

2016-05-23.zip

.lyx-file and .tex-files

(14.92 KiB) Downloaded 163 times

If you need more material to help, please don't hesitate to tell me.

[scottkosty]

That file seems pretty massive. Please take a look at https://wiki.lyx.org/FAQ/MinimalExample

Can you make your example smaller?

[ebop]

I've stopped looking for a solution for the above mentioned errors. I simply returned to LyX 2.1.4 - and compilation runs smoothly!

Thanks to everyone who tried to help me! I think the next problem isn't far away. But for now I say: bye and thanks for the fish