你能解释一下发生了什么事吗？
我正在使用最新的 MiKTeX 2.9.6960 64 位版本（昨天刚刚安装）。
我正在尝试在不使用 inputenc 包的情况下将一些西里尔文文本写入单独的文件：
\documentclass{article}
\begin{document}
\newwrite\testwrite
\immediate\openout\testwrite=testwrite.txt
\immediate\write\testwrite{Ббббббббббббб}
\immediate\closeout\testwrite
\end{document}
但是 LaTeX 并没有告诉我编码有问题，而是告诉我它的一些内部命令未定义。以下是相应日志文件的一部分：
! Undefined control sequence.
\GenericError ...
#4 \errhelp \@err@ ...
l.9 \immediate\write\testwrite{Ббббббббббббб}
?
! Undefined control sequence.
\GenericError ...
\let \@err@ ...
l.9 \immediate\write\testwrite{Ббббббббббббб}
?
! Undefined control sequence.
\GenericError ...
\@empty \def \MessageBreak...
l.9 \immediate\write\testwrite{Ббббббббббббб}
?
! Undefined control sequence.
\GenericError ...
\endgroup
l.9 \immediate\write\testwrite{Ббббббббббббб}
?
! Undefined control sequence.
\GenericError ...
#4 \errhelp \@err@ ...
l.9 \immediate\write\testwrite{Ббббббббббббб}
?
! Undefined control sequence.
\GenericError ...
\let \@err@ ...
l.9 \immediate\write\testwrite{Ббббббббббббб}
?
! Undefined control sequence.
\GenericError ...
\@empty \def \MessageBreak...
l.9 \immediate\write\testwrite{Ббббббббббббб}
等等。
这是一个错误还是发生了什么事情？
感谢您的回答。
答案1
活动字符设置为扩展为排版指令（或显示字符未设置的错误消息），您只需逐字逐句地写下文本即可：
\documentclass{article}
\begin{document}
\newwrite\testwrite
\immediate\openout\testwrite=testwrite.txt
\immediate\write\testwrite{\detokenize{Ббббббббббббб}}
\immediate\closeout\testwrite
\end{document}
答案2
如果你不想使用 inputenc，请添加\UseRawInputEncoding
\UseRawInputEncoding
\documentclass{article}
\begin{document}
\newwrite\testwrite
\immediate\openout\testwrite=testwrite.txt
\immediate\write\testwrite{Ббббббббббббб}
\immediate\closeout\testwrite
\end{document}