我在尝试使用以下工具创建一些基本幻灯片时遇到问题光束级。
这是在我更新MiKTeX 2.9.6360（那是在 2018 年 2 月 26 日）。更新的软件包之一是 Beamer。这是我第一次遇到这种情况。我一直使用 Beamer。
以下是代码：
\documentclass{beamer}
\title{Title} % Enter your title between curly braces
\date{\today}
\begin{document}
\begin{frame}
\titlepage
\end{frame}
\begin{frame}
\frametitle{First Slide}
\framesubtitle{subtitle}
First Content
\end{frame}
\end{document}
现汇编数据显示：
Command Line: pdflatex.exe --interaction=errorstopmode --synctex=-1 "abiertos.tex"
Startup Folder: C:\Users\XXXXXXXXXXXXX
This is pdfTeX, Version 3.14159265-2.6-1.40.18 (MiKTeX 2.9.6600 64-bit)
entering extended mode
(abiertos.tex
LaTeX2e <2017-04-15>
Babel <3.18> and hyphenation patterns for 75 language(s) loaded.
("C:\Program Files\MiKTeX 2.9\tex\latex\beamer\beamer.cls"
Document Class: beamer 2018/02/20 v3.50 A class for typesetting presentations
("C:\Program Files\MiKTeX 2.9\tex\latex\beamer\beamerbasemodes.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\etoolbox\etoolbox.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\beamer\beamerbasedecode.sty"))
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifpdf.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\beamer\beamerbaseoptions.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\keyval.sty"))
("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.sty"
("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifvtex.sty")
("C:\Program Files\MiKTeX 2.9\tex\generic\ifxetex\ifxetex.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.cfg"))
("C:\Program Files\MiKTeX 2.9\tex\latex\base\size11.clo")
("C:\Program Files\MiKTeX 2.9\tex\latex\pgf\basiclayer\pgfcore.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\graphicx.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\graphics.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\trig.sty")
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics-cfg\graphics.cfg")
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics-def\pdftex.def")))
("C:\Program Files\MiKTeX 2.9\tex\latex\pgf\systemlayer\pgfsys.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\pgf\utilities\pgfrcs.sty"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\utilities\pgfutil-common.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\utilities\pgfutil-common-lists.te
x")) ("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\utilities\pgfutil-latex.def"
("C:\Program Files\MiKTeX 2.9\tex\latex\ms\everyshi.sty"))
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\utilities\pgfrcs.code.tex"))
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\systemlayer\pgfsys.code.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\utilities\pgfkeys.code.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\utilities\pgfkeysfiltered.code.te
x")) ("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\systemlayer\pgf.cfg")
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\systemlayer\pgfsys-pdftex.def"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\systemlayer\pgfsys-common-pdf.def
")))
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\systemlayer\pgfsyssoftpath.code.t
ex")
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\systemlayer\pgfsysprotocol.code.t
ex")) ("C:\Program Files\MiKTeX 2.9\tex\latex\xcolor\xcolor.sty"
("C:\Program Files\MiKTeX 2.9\tex\latex\graphics-cfg\color.cfg"))
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\basiclayer\pgfcore.code.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\math\pgfmath.code.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\math\pgfmathcalc.code.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\math\pgfmathutil.code.tex")
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\math\pgfmathparser.code.tex")
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\math\pgfmathfunctions.code.tex"
("C:\Program Files\MiKTeX 2.9\tex\generic\pgf\math\pgfmathfunctions.basic.code.
tex"
! LaTeX Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.1 F
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? x
No pages of output.
Transcript written on abiertos.log.
_____________________________________________________________________
PDFTeXify Compilation Report (Pages: 0)
Errors: 1 Warnings: 0 Bad Boxes: 0
_____________________________________________________________________
看起来软件包一切正常。这可能是页面代码问题，但我不知道。我将非常感谢您的帮助。
答案1
看起来好像文件C:\Program Files\MiKTeX 2.9\tex\generic\pgf\math\pgfmathfunctions.basic.code.tex"已损坏。
因此，最好的方法是pgf使用包管理器（管理员版本，因为原始文件在C:\Program Files）卸载并重新安装该包。