Thanks for the help with getting a hyperlinked index in epub files! After some further discussions on the TeX Stack Exchange I was able to figure out a solution. The problem was that xindy-lisp.exe cannot cope with Umlauts in file names - you can read the details here, if you are interested:
https://tex.stackexchange.com/questions/451221/getting-xindy-to-run-from-a-directory-with-an-umlaut-in-its-path/451494 However, umlauts continue to bedevil me when making index entries. I have once again generated a sample tex file for showcasing the problem: https://drive.google.com/open?id=1vrgnFB-UPOgMq0QLw2mWTMk8GZ3LjcWx When I compile it with pdflatex + MakeIndex in MiKTeX, the index is created properly without any problems: https://drive.google.com/open?id=1_g9ll3ganZM4DDyD3R1CkahwVYX8gjZz However, when I try to compile it with the usual command: tex4ebook -m index -c myconfig.cfg -e mybuild.mk4 Test2.tex using the same myconfig.cfg and mybuild.mk4 as last time: https://drive.google.com/open?id=1juflQcym-qvLheMEr26a0CtsbakFNr5K https://drive.google.com/open?id=1TkxYOozHi_188g7FpwUZ0s_Zxnl-O_fq the compiling process produces all sorts of error messages apparently centered on the entries with umlauts: ! Missing \endcsname inserted. <to be read again> \let l.9 \item \idxkeyword{Riesending-Schachth\"ohle} , \idxlocator{1} ? You can see the logfile here: https://drive.google.com/open?id=1Q8tKD-yrl1yBV0Zpf0892pacBQGtpLzj So... what am I still doing wrong? Best regards, - Jürgen Hubert
