Rules / Output

Missing character: There is no … (U+…) — Characters missing from the font

The font has no glyph for some characters, which are silently dropped from the PDF.

Fix

Use a font that covers the characters (e.g. a CJK font with xeCJK or luatexja).

Example

Reproduced on TeX Live 2026 by CI · xelatex · corpus/missing-glyph

Fails: main.tex
\documentclass{article}
\usepackage{fontspec}
\begin{document}
The dataset name is 数据集 in the original paper.
\end{document}
What TeX prints in main.log
Missing character: There is no 数 (U+6570) in font [lmroman10-regular]:mapping=tex-text;!
Missing character: There is no 据 (U+636E) in font [lmroman10-regular]:mapping=tex-text;!
Missing character: There is no 集 (U+96C6) in font [lmroman10-regular]:mapping=tex-text;!