你好，我需要帮助在我的其中一台计算机上运行一个程序。我更新了我的 MikTex 控制台并刷新了文件，但仍然收到以下错误
我以同样的方式维护另一台计算机的 Windows 10 和更新包。一台编译了 PDF，另一台没有。有点令人沮丧。有什么想法吗？
我使用 \usepackage{iftex} 运行了一个小程序。以下是日志输出：
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (MiKTeX 2.9.7300 64-bit) (preloaded format=pdflatex 2020.3.15) 15 MAR 2020 12:00
entering extended mode
**./LaTeX1.tex
(LaTeX1.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-03-06>
("C:\Program Files\MiKTeX 2.9\tex/latex/base\article.cls"
Document Class: article 2019/12/20 v1.4l Standard LaTeX document class
("C:\Program Files\MiKTeX 2.9\tex/latex/base\size10.clo"
File: size10.clo 2019/12/20 v1.4l Standard LaTeX file (size option)
)
\c@part=\count167
\c@section=\count168
\c@subsection=\count169
\c@subsubsection=\count170
\c@paragraph=\count171
\c@subparagraph=\count172
\c@figure=\count173
\c@table=\count174
\abovecaptionskip=\skip47
\belowcaptionskip=\skip48
\bibindent=\dimen134
)
("C:\Program Files\MiKTeX 2.9\tex/generic/iftex\iftex.sty"
Package: iftex 2020/03/06 v1.0d TeX engine tests
)
("C:\Program Files\MiKTeX 2.9\tex/latex/l3backend\l3backend-pdfmode.def"
File: l3backend-pdfmode.def 2020-03-12 L3 backend support: PDF mode
\l__kernel_color_stack_int=\count175
\l__pdf_internal_box=\box45
)
No file LaTeX1.aux.
\openout1 = `LaTeX1.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 5.
LaTeX Font Info: ... okay on input line 5.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 5.
LaTeX Font Info: ... okay on input line 5.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 5.
LaTeX Font Info: ... okay on input line 5.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 5.
LaTeX Font Info: ... okay on input line 5.
LaTeX Font Info: Checking defaults for TS1/cmr/m/n on input line 5.
LaTeX Font Info: ... okay on input line 5.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 5.
LaTeX Font Info: ... okay on input line 5.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 5.
LaTeX Font Info: ... okay on input line 5.
[1
{C:/Users/BretS/AppData/Local/MiKTeX/2.9/pdftex/config/pdftex.map}]
(LaTeX1.aux) )
Here is how much of TeX's memory you used:
411 strings out of 480896
6776 string characters out of 2908249
239592 words of memory out of 3000000
16376 multiletter control sequences out of 15000+200000
532338 words of font info for 24 fonts, out of 3000000 for 9000
1141 hyphenation exceptions out of 8191
25i,4n,19p,130b,97s stack positions out of 5000i,500n,10000p,200000b,50000s
<C:/Program Files/MiKTeX 2.9/fonts/type1/public/amsfonts/cm/cmr10
.pfb>
Output written on LaTeX1.pdf (1 page, 10815 bytes).
PDF statistics:
10 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
1 words of extra memory for PDF output out of 10000 (max. 10000000)