Couldn't open font map file "kanjix.map". with MiKTeX

Question

\documentclass{article}
\begin{document}
Foo
\end{document}

When compiling this MWE with MiKTeX 2.9’s xelatex, I get the following warning:

** WARNING ** Couldn't open font map file "kanjix.map".

The compilation runs through, no problems, but it bugs me that I get this message every time. It seems to come from Windows and not from xelatex, because it doesn’t appear in the log file, only in the command line. Here is the full command line output:

C:\Users\doncherry\Documents\LaTeX>xelatex bar.tex
This is XeTeX, Version 3.1415926-2.5-0.9999.3 (MiKTeX 2.9)
entering extended mode
(C:\Users\doncherry\Documents\LaTeX\bar.tex
LaTeX2e 
Babel  and hyphenation patterns for english, ancientgreek, french, germa
n, german-x-2013-05-26, greek, italian, latin, ngerman, ngerman-x-2013-05-26, r
ussian, spanish, swissgerman, ukenglish, usenglishmax, loaded.
("C:\Program Files (x86)\MiKTeX\2.9\tex\latex\base\article.cls"
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
("C:\Program Files (x86)\MiKTeX\2.9\tex\latex\base\size10.clo"))
(C:\Users\doncherry\Documents\LaTeX\bar.aux) [1]
(C:\Users\doncherry\Documents\LaTeX\bar.aux) )
** WARNING ** Couldn't open font map file "kanjix.map".

Output written on bar.pdf (1 page).
Transcript written on bar.log.

There are a few similar questions here, but none of them apply to this specific situation:

• xelatex problem: Missing chars in TeXLive 2013 / \textfont XXX is undefined errors in miktex (Bottomline: It’s been fixed)
• xetex complains about missing kanjix.map (TeX Live-specific solution)
• Font problems when using IPAexMincho (Using a special font)

Is there any way I can get rid of this warning? (Not just silence it, but cure the cause)

Answer 1

You need a kanjix.map (an empty, dummy map is quite ok) or you should change the dvipdfmx.cfg. http://sourceforge.net/p/miktex/bugs/2286/

Answer 2

Note: The file dvipdfmx.cfg shouldn't be edited directly due to Miktex updating will repaire the file, but do the followings instead.

1. Open a Windows Command Line prompt and input initexmf --edit-config-file dvipdfmx, press Enter.
2. Append this line to the end of the opened file.

%%f kanjix.map