Errors & troubleshooting
Reading errors & debuggingHow to read errors: Error line l.NN・The ? prompt・h / x / q actions・The .log file・Reading the log (texfot): .log file・texfot・Filtering warnings・Debugging (\tracingall, etc.): \tracingall・\show・\showthe・\typeout・\messageError & warning listsTeX error messages: ! Undefined control sequence・! Missing $ inserted・! Too many }'s・! Missing } inserted・! Misplaced alignment tab character &・LaTeX error messages: ! LaTeX Error: File not found・! LaTeX Error: Environment undefined・! LaTeX Error: \begin{...} ended by \end{...}・! LaTeX Error: Something's wrong--perhaps a missing \item・! LaTeX Error: Command already defined・LaTeX warning messages: Overfull \hbox・Underfull \hbox・Reference undefined・Citation undefined・Label multiply defined・Font shape undefined・Common LaTeX misuse: Unclosed math・Too many &・Misused \\・Brace mismatchUndefined control sequencee.g. \fra{} のような綴り間違い・Cause: 未定義の命令、パッケージ未読込・Fix: 綴りを確認・\usepackage で読込Missing $ insertede.g. 地の文で _ や \alpha を使用・Cause: 数式モード外で数式要素を使用・Fix: $ … $ で囲むOverfull / Underfull \hboxe.g. 長い URL や長い単語・Cause: 行に収まらない・Fix: \sloppy・microtype・\url・改行Missing \begin{document}e.g. 本文がプリアンブルに混入・Cause: \begin{document} 前に出力が発生・Fix: \begin{document} と文字コードを確認Undefined references & duplicate labelse.g. ?? と表示される・Cause: ラベル未定義・再コンパイル不足・Fix: 2回コンパイル・\label を確認Runaway argumente.g. } の閉じ忘れ・Cause: 引数が段落をまたぐ・括弧不一致・Fix: 括弧の対応を確認Package clashese.g. Option clash for package・Cause: 同じパッケージを別オプションで2回読込・Fix: \PassOptionsToPackage・読込順を整理FAQJapanese not showing・Fonts not embedded・References stay ??・Image not appearing