从昨天下午开始，我在使用最新的 MiKTeX (v. 21.1) 和 TexStudio (v. 3.0.4) 后遇到了一些问题。我尝试使用pdflatex，但我总是收到此错误消息：
“抱歉，但 pdflatex.exe 未能成功。希望日志文件包含让 MiKTeX 再次运行的信息：... 进程因错误退出”
pdflatex日志文件报告中的最新消息如下：
2021-01-24 12:28:31,726+0100 FATAL pdflatex.core - Data: fileName="pdflatex.fmt"
2021-01-24 12:28:31,726+0100 FATAL pdflatex.core - Source: Libraries\MiKTeX\TeXAndFriends\texmfapp.cpp:717
2021-01-24 12:28:31,726+0100 FATAL pdflatex - The memory dump file could not be found.
2021-01-24 12:28:31,726+0100 FATAL pdflatex - Info: fileName="pdflatex.fmt"
2021-01-24 12:28:31,726+0100 FATAL pdflatex - Source: Libraries\MiKTeX\TeXAndFriends\texmfapp.cpp
2021-01-24 12:28:31,726+0100 FATAL pdflatex - Line: 717
2021-01-24 12:28:31,726+0100 INFO pdflatex - this process (948) finishes with exit code 1
我其实不知道这些错误是什么意思，特别是这种问题在我从 MiKTeX 控制台运行更新检查后出现。因此，我相信它有某种关联。\
编辑pdflatex以下是存储在文件夹中的 完整日志文件makefmt：
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (MiKTeX 21.1) (INITEX) 24 JAN 2021 16:38
entering extended mode
**.../AppData/Local/Programs/MiKTeX/tex/latex/00miktex/pdflatex.in
i
(...AppData/Local/Programs/MiKTeX/tex/latex/00miktex/pdflatex.ini
(...\AppData\Roaming\MiKTeX\tex/generic/config\pdftexconfig.tex)
(...\AppData\Local\Programs\MiKTeX\tex/latex/base\latex.ltx
(...\AppData\Local\Programs\MiKTeX\tex/latex/base\texsys.cfg)
\openout15 = `texsys.aux'.
./texsys.aux found
\@currdir set to: ./.
Assuming \openin and \input
have the same search path.
Defining UNIX/DOS style filename parser.
catcodes, registers,
\maxdimen=\dimen10
\hideskip=\skip10
\p@=\dimen11
\z@=\dimen12
\z@skip=\skip11
\voidb@x=\box10
parameters,
\normalbaselineskip=\skip12
\normallineskip=\skip13
\normallineskiplimit=\dimen13
\interfootnotelinepenalty=\count23
\strutbox=\box11
LaTeX2e <2020-10-01> patch level 4
(...\AppData\Local\Programs\MiKTeX\tex/latex/l3kernel\expl3.ltx
(...\AppData\Local\Programs\MiKTeX\tex/latex/l3kernel\expl3-code.t
ex
Package: expl3 2021-01-09 L3 programming layer (code)
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\c_zero_skip=\skip14
\c_max_skip=\skip15
\l_tmpa_skip=\skip16
\l_tmpb_skip=\skip17
\g_tmpa_skip=\skip18
\g_tmpb_skip=\skip19
\c_zero_muskip=\muskip10
\c_max_muskip=\muskip11
\l_tmpa_muskip=\muskip12
\l_tmpb_muskip=\muskip13
\g_tmpa_muskip=\muskip14
\g_tmpb_muskip=\muskip15
\l_keys_choice_int=\count38
\l__intarray_loop_int=\count39
\c__intarray_sp_dim=\dimen20
\g__intarray_font_int=\count40
\c__fp_leading_shift_int=\count41
\c__fp_middle_shift_int=\count42
\c__fp_trailing_shift_int=\count43
\c__fp_big_leading_shift_int=\count44
\c__fp_big_middle_shift_int=\count45
\c__fp_big_trailing_shift_int=\count46
\c__fp_Bigg_leading_shift_int=\count47
\c__fp_Bigg_middle_shift_int=\count48
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\c__regex_catcode_D_int=\count82
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\c__regex_catcode_L_int=\count84
\c__regex_catcode_O_int=\count85
\c__regex_catcode_A_int=\count86
\c__regex_all_catcodes_int=\count87
\l__regex_show_lines_int=\count88
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\l__regex_curr_char_int=\count99
\l__regex_curr_catcode_int=\count100
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\l__coffin_bounding_shift_dim=\dimen36
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\l__coffin_display_x_dim=\dimen44
\l__coffin_display_y_dim=\dimen45
! LaTeX3 Error: File 'UnicodeData.txt' not found.
For immediate help type H <return>.
...
l.28684 }
! ==> Fatal error occurred, no output PDF file produced!