Trying to create a properly sorted Russian index, I ran into the below error with xindy:
ERROR: CHAR: index 0 should be less than the length of the string
here it says that this error is from an "older" version of xindy but its homepage lists v. 2.1 while my TexLive distribution comes with 2.5.1:
$ xindy -V
xindy release: 2.5.1
xindy script version: 1.18
xindy kernel version: 3.0
CLISP version 2.49.92 (2018-02-18) (built on bulldog [127.0.0.1])
architecture: X86_64
What steps should I take to arrive at the properly sorted Russian index?
The full log printed by xindy follows:
$texindy -L russian -C utf8 "document.idx"
Opening logfile "/dev/null" (done)
Reading indexstyle...
Loading module "/tmp/UnwOZdterz"...
Loading module "lang/russian/utf8-lang.xdy"...
Loading module "lang/russian/utf8.xdy"...
Finished loading module "lang/russian/utf8.xdy".
Finished loading module "lang/russian/utf8-lang.xdy".
Loading module "tex/inputenc/utf8.xdy"...
Finished loading module "tex/inputenc/utf8.xdy".
Loading module "/usr/local/texlive/2018/texmf-dist/xindy/modules/base/texindy.xdy"...
Loading module "numeric-sort.xdy"...
Finished loading module "numeric-sort.xdy".
Loading module "latex.xdy"...
Loading module "tex.xdy"...
Finished loading module "tex.xdy".
Finished loading module "latex.xdy".
Loading module "latex-loc-fmts.xdy"...
Finished loading module "latex-loc-fmts.xdy".
Loading module "makeindex.xdy"...
Finished loading module "makeindex.xdy".
Loading module "latin-lettergroups.xdy"...
Finished loading module "latin-lettergroups.xdy".
Finished loading module "/usr/local/texlive/2018/texmf-dist/xindy/modules/base/texindy.xdy".
Loading module "/usr/local/texlive/2018/texmf-dist/xindy/modules/base/page-ranges.xdy"...
Finished loading module "/usr/local/texlive/2018/texmf-dist/xindy/modules/base/page-ranges.xdy".
Loading module "/usr/local/texlive/2018/texmf-dist/xindy/modules/base/word-order.xdy"...
Finished loading module "/usr/local/texlive/2018/texmf-dist/xindy/modules/base/word-order.xdy".
Finished loading module "/tmp/UnwOZdterz".
Finished reading indexstyle.
Finalizing indexstyle... (done)
Reading raw-index "/tmp/45N_dB_6Y8"...
ERROR: CHAR: index 0 should be less than the length of the string
\index{\alpha}).texindy. How is the user supposed to troubleshoot that? There are no empty index entries in the document. What is next?