I'm using the kotex package in order to write in Korean in MikTex, and I found out that an error occurs on certain letters.
\documentclass{scrartcl}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{newtxtext}
\usepackage[nonewtxmathopt]{newtxmath}
\usepackage{kotex}
\begin{document}
\section{가}
나
\begin{enumerate}
\item ㄷ
\end{enumerate}
\end{document}
The error message is
Couldn't open `uwmj.cfg'
No creation rule for font uwmj31. ! Font
LUC/uhcmj/m/n/10.95/31=uwmj31 at 10.95pt not loadable: Metric (TFM) file not found.
The log is full of 'No creation rule for font uwmj31.', 'No creation rule for font NanumMyeongjo.' etc.
The error only occurs when it faces a single letter; in this case, 'ㄷ' is the cause. The location of the letter doesn't matter. I tried searching for uwmj31 and downloading it but I don't know where I can find it, and I don't know the manual installation procedure either. The problem occuring here seems to be similar to the one in here, but I'm not 100% sure about it.
I've always had a similar problem, and now I decided it's time to learn how to solve this. It seems like MikTex has some bugs related to CJk fonts, and one solution would be just discarding MikTex and using TexLive, but I wish I can keep using MikTex for now.
\pdfmapfile{=umj.map}to your document or add the map via updmap. – Ulrike Fischer Jun 16 '17 at 14:12