不幸的是，我遇到了与fontenc-Latex 编译问题。我重新安装了 TeX 并运行了tlmgr update，但都无济于事。我使用的是 RStudio 版本 1.3.820（但在 RStudio 版本 1.2.5033 中也遇到了同样的问题），并更新了所有软件包。我怀疑错误在于使用旧版本LaTeX2e <2018-12-01>，但我不知道为什么要使用这个版本，即使我已经使用各种不同的存储库重新安装了 TeX。
我注意到无论我使用哪个存储库都会出现以下错误：
tlmgr install: package ifluatex not present in repository.
tlmgr install: package ifxetex not present in repository.
我怀疑这可能会导致问题，对吗？有什么建议可以解决此问题吗？再次，运行tlmgr update --all --self不会报告任何错误或需要更新。
在 RStudio 中编织文本时，我收到以下日志：
/usr/local/bin/pandoc +RTS -K512m -RTS MODE_proposal_APA.utf8.md --to latex --from markdown+autolink_bare_uris+tex_math_single_backslash+raw_attribute --output MODE_proposal_APA.tex --self-contained --highlight-style tango --pdf-engine pdflatex --include-in-header /Library/Frameworks/R.framework/Versions/3.6/Resources/library/papaja/rmarkdown/templates/apa6/resources/apa6_header_includes.tex --variable graphics --lua-filter /Library/Frameworks/R.framework/Versions/3.6/Resources/library/rmarkdown/rmd/lua/pagebreak.lua --lua-filter /Library/Frameworks/R.framework/Versions/3.6/Resources/library/rmarkdown/rmd/lua/latex-div.lua --wrap preserve --csl /Library/Frameworks/R.framework/Versions/3.6/Resources/library/papaja/rmd/apa6.csl --filter /usr/local/bin/pandoc-citeproc --lua-filter /Library/Frameworks/R.framework/Versions/3.6/Resources/library/rmdfiltr/replace_ampersands.lua --lua-filter /Library/Frameworks/R.framework/Versions/3.6/Resources/library/rmdfiltr/wordcount.lua --variable 'classoption:,doc,a4paper' --variable 'lang:en-US' --variable 'subparagraph:yes' --variable 'block-headings:no' --include-in-header /var/folders/hh/vy5948dx2jv2v9qc_m2tbrx00000gn/T//Rtmp9tAYmU/includes_14464266266e.tex
output file: MODE_proposal_APA.knit.md
! Undefined control sequence.
l.115 \xdef\@fontenc@load@list{\@fontenc@load@list
我的所有文档都不再呈现。因此使用不同的类没有区别。我非常感谢任何关于如何解决这个问题的建议，因为简单地运行tlmgr update并不能解决这个问题。（抱歉之前在答案中发布了这个问题）。
这是日志文件：
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (preloaded format=pdflatex 2019.5.12) 21 FEB 2020 12:07
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
**MODE_proposal_APA.tex
(./MODE_proposal_APA.tex
LaTeX2e <2018-12-01>
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/apa7/apa7.cls
Document Class: apa7 2019/12/30 v1.04 APA formatting (7th edition)
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/article.cls
Document Class: article 2019/12/20 v1.4l Standard LaTeX document class
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/size11.clo
File: size11.clo 2019/12/20 v1.4l Standard LaTeX file (size option)
)
\c@part=\count80
\c@section=\count81
\c@subsection=\count82
\c@subsubsection=\count83
\c@paragraph=\count84
\c@subparagraph=\count85
\c@figure=\count86
\c@table=\count87
\abovecaptionskip=\skip41
\belowcaptionskip=\skip42
\bibindent=\dimen102
) (/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/etoolbox/etoolbox.sty
Package: etoolbox 2019/09/21 v2.5h e-TeX tools for LaTeX (JAW)
\etb@tempcnta=\count88
)
Class apa7 Info: No bibliography package was specified; defaulting to (but not
loading) Biblatex on input line 218.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/lm/lmodern.sty
Package: lmodern 2009/10/30 v1.6 Latin Modern Fonts
LaTeX Font Info: Overwriting symbol font `operators' in version `normal'
(Font) OT1/cmr/m/n --> OT1/lmr/m/n on input line 22.
LaTeX Font Info: Overwriting symbol font `letters' in version `normal'
(Font) OML/cmm/m/it --> OML/lmm/m/it on input line 23.
LaTeX Font Info: Overwriting symbol font `symbols' in version `normal'
(Font) OMS/cmsy/m/n --> OMS/lmsy/m/n on input line 24.
LaTeX Font Info: Overwriting symbol font `largesymbols' in version `normal'
(Font) OMX/cmex/m/n --> OMX/lmex/m/n on input line 25.
LaTeX Font Info: Overwriting symbol font `operators' in version `bold'
(Font) OT1/cmr/bx/n --> OT1/lmr/bx/n on input line 26.
LaTeX Font Info: Overwriting symbol font `letters' in version `bold'
(Font) OML/cmm/b/it --> OML/lmm/b/it on input line 27.
LaTeX Font Info: Overwriting symbol font `symbols' in version `bold'
(Font) OMS/cmsy/b/n --> OMS/lmsy/b/n on input line 28.
LaTeX Font Info: Overwriting symbol font `largesymbols' in version `bold'
(Font) OMX/cmex/m/n --> OMX/lmex/m/n on input line 29.
LaTeX Font Info: Overwriting math alphabet `\mathbf' in version `normal'
(Font) OT1/cmr/bx/n --> OT1/lmr/bx/n on input line 31.
LaTeX Font Info: Overwriting math alphabet `\mathsf' in version `normal'
(Font) OT1/cmss/m/n --> OT1/lmss/m/n on input line 32.
LaTeX Font Info: Overwriting math alphabet `\mathit' in version `normal'
(Font) OT1/cmr/m/it --> OT1/lmr/m/it on input line 33.
LaTeX Font Info: Overwriting math alphabet `\mathtt' in version `normal'
(Font) OT1/cmtt/m/n --> OT1/lmtt/m/n on input line 34.
LaTeX Font Info: Overwriting math alphabet `\mathbf' in version `bold'
(Font) OT1/cmr/bx/n --> OT1/lmr/bx/n on input line 35.
LaTeX Font Info: Overwriting math alphabet `\mathsf' in version `bold'
(Font) OT1/cmss/bx/n --> OT1/lmss/bx/n on input line 36.
LaTeX Font Info: Overwriting math alphabet `\mathit' in version `bold'
(Font) OT1/cmr/bx/it --> OT1/lmr/bx/it on input line 37.
LaTeX Font Info: Overwriting math alphabet `\mathtt' in version `bold'
(Font) OT1/cmtt/m/n --> OT1/lmtt/m/n on input line 38.
) (/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/fontenc.sty
Package: fontenc 2020/02/11 v2.0o Standard LaTeX package
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/t1enc.def
File: t1enc.def 2020/02/11 v2.0o Standard LaTeX file
LaTeX Font Info: Redeclaring font encoding T1 on input line 48.
)
LaTeX Font Info: Try loading font information for T1+lmr on input line 112.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/lm/t1lmr.fd
File: t1lmr.fd 2009/10/30 v1.6 Font defs for Latin Modern
)
! Undefined control sequence.
l.115 \xdef\@fontenc@load@list{\@fontenc@load@list
Here is how much of TeX's memory you used:
865 strings out of 494553
9932 string characters out of 6176313
67509 words of memory out of 5000000
4605 multiletter control sequences out of 15000+600000
6930 words of font info for 16 fonts, out of 8000000 for 9000
14 hyphenation exceptions out of 8191
33i,0n,29p,804b,76s stack positions out of 5000i,500n,10000p,200000b,80000s
! ==> Fatal error occurred, no output PDF file produced!
根据要求的输出fmtutil-sys --byfmt pdflatex
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehypht-
x-2019-04-04.pat
German Hyphenation Patterns (Traditional Orthography) `dehypht-x' 2019-04-04 (W
L)))
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehyphn-
x-2019-04-04.tex dehyph-exptl: using an 8-bit TeX engine.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehyphn-
x-2019-04-04.pat
German Hyphenation Patterns (Reformed Orthography, 2006) `dehyphn-x' 2019-04-04
(WL)))) (/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/utf8.def
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/omsenc.dfu)
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/ot1enc.dfu)
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/t1enc.dfu)
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/ts1enc.dfu))
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/ltexpl.ltx
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/l3kernel/expl3.ltx
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/l3kernel/expl3-code.tex
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/l3kernel/l3deprecation.
def))))
) )
Beginning to dump on file pdflatex.fmt
(preloaded format=pdflatex 2020.2.21)
16842 strings of total length 286120
230907 memory locations dumped; current usage is 165&224195
15135 multiletter control sequences
\font\nullfont=nullfont
\font\OMX/cmex/m/n/10=cmex10
\font\tenln=line10
\font\tenlnw=linew10
\font\tencirc=lcircle10
\font\tencircw=lcirclew10
\font\OT1/cmr/m/n/5=cmr5
\font\OT1/cmr/m/n/7=cmr7
\font\OT1/cmr/m/n/10=cmr10
\font\OML/cmm/m/it/5=cmmi5
\font\OML/cmm/m/it/7=cmmi7
\font\OML/cmm/m/it/10=cmmi10
\font\OMS/cmsy/m/n/5=cmsy5
\font\OMS/cmsy/m/n/7=cmsy7
\font\OMS/cmsy/m/n/10=cmsy10
\font\c__fp_exp_intarray=cmr10 at 0.00002pt
\font\c__fp_trig_intarray=cmr10 at 0.00003pt
\font\g__regex_charcode_intarray=cmr10 at 0.00005pt
\font\g__regex_catcode_intarray=cmr10 at 0.00006pt
\font\g__regex_balance_intarray=cmr10 at 0.00008pt
\font\g__regex_state_active_intarray=cmr10 at 0.00009pt
\font\g__regex_thread_state_intarray=cmr10 at 0.0001pt
\font\g__regex_submatch_prev_intarray=cmr10 at 0.00012pt
\font\g__regex_submatch_begin_intarray=cmr10 at 0.00014pt
\font\g__regex_submatch_end_intarray=cmr10 at 0.00015pt
532331 words of font info for 24 preloaded fonts
14 hyphenation exceptions
Hyphenation trie of length 67075 has 1136 ops out of 35111
475 for language 4
478 for language 3
2 for language 1
181 for language 0
0 words of pdfTeX memory
0 indirect objects
No pages of output.
Transcript written on pdflatex.log.
fmtutil [INFO]: log file copied to: /Users/jrennstich/Library/TinyTeX/texmf-var/web2c/pdftex/pdflatex.log
fmtutil [INFO]: /Users/jrennstich/Library/TinyTeX/texmf-var/web2c/pdftex/pdflatex.fmt installed.
fmtutil [INFO]: --- remaking pdfetex with pdftex
fmtutil: running `pdftex -ini -jobname=pdfetex -progname=pdfetex -translate-file=cp227.tcx *pdfetex.ini' ...
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (INITEX)
restricted \write18 enabled.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/web2c/cp227.tcx)
entering extended mode
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/plain/config/pdfetex.ini
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/tex-ini-files/pdftexc
onfig.tex)
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/plain/etex/etex.src
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/plain/base/plain.tex
Preloading the plain format: codes, registers, parameters, fonts, more fonts,
macros, math definitions, output routines, hyphenation
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/hyphen/hyphen.tex
[skipping from \patterns to end-of-file...]))
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/plain/etex/etexdefs.lib
Skipping module "grouptypes"; Loading module "interactionmodes";
Skipping module "nodetypes"; Skipping module "iftypes";)
(/Users/jrennstich/Library/TinyTeX/texmf-var/tex/generic/config/language.def
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/hyphen/hyphen.tex)
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehypht-
x-2019-04-04.tex dehyph-exptl: using an 8-bit TeX engine.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehypht-
x-2019-04-04.pat
German Hyphenation Patterns (Traditional Orthography) `dehypht-x' 2019-04-04 (W
L)))
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehypht-
x-2019-04-04.tex dehyph-exptl: using an 8-bit TeX engine.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehypht-
x-2019-04-04.pat
German Hyphenation Patterns (Traditional Orthography) `dehypht-x' 2019-04-04 (W
L)))
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehyphn-
x-2019-04-04.tex dehyph-exptl: using an 8-bit TeX engine.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehyphn-
x-2019-04-04.pat
German Hyphenation Patterns (Reformed Orthography, 2006) `dehyphn-x' 2019-04-04
(WL)))
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehyphn-
x-2019-04-04.tex dehyph-exptl: using an 8-bit TeX engine.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/dehyph-exptl/dehyphn-
x-2019-04-04.pat
German Hyphenation Patterns (Reformed Orthography, 2006) `dehyphn-x' 2019-04-04
(WL)))) Augmenting the Plain TeX definitions: \tracingall;
Adding new e-TeX definitions: \eTeX, \loggingall, \tracingnone,
register allocation; extended register allocation;
Recycling: \addlanguage, \@nswer (not defined), \@sk, \b@dresponsetrue,
\b@dresponsefalse, \ch@ckforyn, \mayber@cycle, \et@xabort, \et@xbuf,
\et@xfmtsrc, \et@xfilehdr, \et@xinf, \et@xpatterns, \l@ngdefnfile, \n@xt,
\p@rse (not defined), \pr@mpt (not defined), \pr@mptloop (not defined),
\forcer@cycle, \usef@llback, \usef@llbacktrue, \usef@llbackfalse,
Retaining: \et@xerr, \et@xinput, \et@xlibhdr, \et@xmsg, \et@xtoks, \et@xwarn,
\et@xl@@d, \et@xl@ad, \et@xload, \et@xlang, \et@xhash, \eTeX, \etexhdrchk,
\etexstatus, \module, \uselanguage, \r@tain, \r@cycle,)
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/plain/config/pdftexmagfix.tex
) )
Beginning to dump on file pdfetex.fmt
(preloaded format=pdfetex 2020.2.21)
2939 strings of total length 45509
8034 memory locations dumped; current usage is 203&7395
1282 multiletter control sequences
\font\nullfont=nullfont
\font\tenrm=cmr10
\font\preloaded=cmr9
\font\preloaded=cmr8
\font\sevenrm=cmr7
\font\preloaded=cmr6
\font\fiverm=cmr5
\font\teni=cmmi10
\font\preloaded=cmmi9
\font\preloaded=cmmi8
\font\seveni=cmmi7
\font\preloaded=cmmi6
\font\fivei=cmmi5
\font\tensy=cmsy10
\font\preloaded=cmsy9
\font\preloaded=cmsy8
\font\sevensy=cmsy7
\font\preloaded=cmsy6
\font\fivesy=cmsy5
\font\tenex=cmex10
\font\preloaded=cmss10
\font\preloaded=cmssq8
\font\preloaded=cmssi10
\font\preloaded=cmssqi8
\font\tenbf=cmbx10
\font\preloaded=cmbx9
\font\preloaded=cmbx8
\font\sevenbf=cmbx7
\font\preloaded=cmbx6
\font\fivebf=cmbx5
\font\tentt=cmtt10
\font\preloaded=cmtt9
\font\preloaded=cmtt8
\font\preloaded=cmsltt10
\font\tensl=cmsl10
\font\preloaded=cmsl9
\font\preloaded=cmsl8
\font\tenit=cmti10
\font\preloaded=cmti9
\font\preloaded=cmti8
\font\preloaded=cmti7
\font\preloaded=cmu10
\font\preloaded=cmmib10
\font\preloaded=cmbsy10
\font\preloaded=cmcsc10
\font\preloaded=cmssbx10
\font\preloaded=cmdunh10
\font\preloaded=cmr7 at 14.51799pt
\font\preloaded=cmtt10 at 14.4pt
\font\preloaded=cmssbx10 at 14.4pt
\font\preloaded=manfnt
14787 words of font info for 50 preloaded fonts
14 hyphenation exceptions
Hyphenation trie of length 67065 has 2087 ops out of 35111
475 for language 4
475 for language 3
478 for language 2
478 for language 1
181 for language 0
0 words of pdfTeX memory
0 indirect objects
No pages of output.
Transcript written on pdfetex.log.
fmtutil [INFO]: log file copied to: /Users/jrennstich/Library/TinyTeX/texmf-var/web2c/pdftex/pdfetex.log
fmtutil [INFO]: /Users/jrennstich/Library/TinyTeX/texmf-var/web2c/pdftex/pdfetex.fmt installed.
fmtutil [INFO]: --- remaking dvilualatex with luatex
fmtutil: running `luatex -ini -jobname=dvilualatex -progname=dvilualatex dvilualatex.ini' ...
This is LuaTeX, Version 1.10.0 (TeX Live 2019) (INITEX)
restricted system commands enabled.
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/tex-ini-files/dvilual
atex.ini
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/tex-ini-files/lualate
x.ini
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/tex-ini-files/luatexc
onfig.tex
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/generic/tex-ini-files/pdftexc
onfig.tex))
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/latex.ltx
(/Users/jrennstich/Library/TinyTeX/texmf-dist/tex/latex/base/texsys.cfg)
./texsys.aux found