[Tex/LaTex] Error after MiKTeX reinstall: Text line contains an invalid character

biblatexerrorssymbols

I recently had to reformat my D: drive where MiKTeX was installed. I reinstalled MiKTeX, but now the project I was working on won't compile. I tried repairing, uninstalling, and reinstalling MiKTeX, but nothing worked. Finally, I uninstalled MiKTeX and installed TeXLive, but the issue persists.

When I try to run pdflatex, I get the error:

...
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/biblatex/biblatex.sty
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/logreq/logreq.sty
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/logreq/logreq.def))
! Text line contains an invalid character.
l.2175      \bgroup\nohyphenation#1\egroup^^^
                                             ^200b}}

Texmaker shows that the issue is in the biblatex.sty file. Lines 2171-2175 from that file:

\ifundef\XeTeXrevision
  {\providerobustcmd*{\textnohyphenation}[1]{%
     \bgroup\nohyphenation#1\egroup}}
  {\providerobustcmd*{\textnohyphenation}[1]{%
     \bgroup\nohyphenation#1\egroup^^^^200b}}

I haven't edited this file.

If I type in R when pdflatex is paused, the compilation continues and the pdf is created without errors from what I can tell, so this is really just a convenience issue. I can't e.g. compile the project in Texmaker.

main.log:

This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020/W32TeX) (preloaded format=pdflatex 2020.10.1)  1 OCT 2020 21:59
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**main.tex
(./main.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-09-24> (./tauthesis.cls
Document Class: tauthesis 2020/05/18 v1.6 Thesis styles used in Tampere Univers
ity
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/base/report.cls
Document Class: report 2019/12/20 v1.4l Standard LaTeX document class
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/base/size12.clo
File: size12.clo 2019/12/20 v1.4l Standard LaTeX file (size option)
)
\c@part=\count168
\c@chapter=\count169
\c@section=\count170
\c@subsection=\count171
\c@subsubsection=\count172
\c@paragraph=\count173
\c@subparagraph=\count174
\c@figure=\count175
\c@table=\count176
\abovecaptionskip=\skip47
\belowcaptionskip=\skip48
\bibindent=\dimen134
)
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/pdfx/pdfx.sty
Package: pdfx 2019/02/27 v1.6.3 PDF/X and PDF/A support (CVR/HTH/RRM/PS)
\pdfx@minorversion=\count177

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Package: iftex 2020/03/06 v1.0d TeX engine tests
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Package: ifpdf 2019/10/25 v3.4 ifpdf legacy package. Use iftex instead.
)
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Package: ifxetex 2019/10/25 v0.7 ifxetex legacy package. Use iftex instead.
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Package: everyshi 2001/05/15 v3.00 EveryShipout Package (MS)
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Package: ifluatex 2019/10/25 v1.5 ifluatex legacy package. Use iftex instead.
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Package: inputenc 2018/08/11 v1.3c Input encoding file
\inpenc@prehook=\toks15
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File: l8u-penc.def 2017/06/23 v0.8 Custom LaTeX file, for UTF8 encoded letters 
and symbols
LaTeX Info: Composite with undeclared \b in encoding L8U on input line 278.

(d:/Program Files/texlive/2020/texmf-dist/tex/latex/pdfx/l8ugrk-penc.def
File: l8ugrk-penc.def 2018/11/28 v0.6 Greek support for UTF8 in XMP metadata
)
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File: l8umath-penc.def 2017/06/23 v0.6 Custom LaTeX file, for UTF8 encoded math
 symbols
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\pdfxsafeforxmp@toks=\toks17

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Package: xcolor 2016/05/11 v2.12 LaTeX color extensions (UK)

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Package xcolor Info: Driver file: pdftex.def on input line 225.

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Package xcolor Info: Model `cmy' substituted by `cmy0' on input line 1348.
Package xcolor Info: Model `hsb' substituted by `rgb' on input line 1352.
Package xcolor Info: Model `RGB' extended on input line 1364.
Package xcolor Info: Model `HTML' substituted by `rgb' on input line 1366.
Package xcolor Info: Model `Hsb' substituted by `hsb' on input line 1367.
Package xcolor Info: Model `tHsb' substituted by `hsb' on input line 1368.
Package xcolor Info: Model `HSB' substituted by `hsb' on input line 1369.
Package xcolor Info: Model `Gray' substituted by `gray' on input line 1370.
Package xcolor Info: Model `wave' substituted by `hsb' on input line 1371.
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\pdfx@tmptoks=\toks18

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Package pdftexcmds Info: \pdfdraftmode found.
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(d:/Program Files/texlive/2020/texmf-dist/tex/latex/kvoptions/kvoptions.sty
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\@linkdim=\dimen135
\Hy@linkcounter=\count178
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(d:/Program Files/texlive/2020/texmf-dist/tex/latex/hyperref/pd1enc.def
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\Hy@SavedSpaceFactor=\count180
Package hyperref Info: Option `pdfa' set `true' on input line 4338.
Package hyperref Info: Hyper figures OFF on input line 4464.
Package hyperref Info: Link nesting OFF on input line 4469.
Package hyperref Info: Hyper index ON on input line 4472.
Package hyperref Info: Plain pages OFF on input line 4479.
Package hyperref Info: Backreferencing OFF on input line 4484.
Package hyperref Info: Implicit mode ON; LaTeX internals redefined.
Package hyperref Info: Bookmarks ON on input line 4717.
\c@Hy@tempcnt=\count181

(d:/Program Files/texlive/2020/texmf-dist/tex/latex/url/url.sty
\Urlmuskip=\muskip16
Package: url 2013/09/16  ver 3.4  Verb mode for urls, etc.
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LaTeX Info: Redefining \url on input line 5076.
\XeTeXLinkMargin=\dimen136

(d:/Program Files/texlive/2020/texmf-dist/tex/generic/bitset/bitset.sty
Package: bitset 2019/12/09 v1.3 Handle bit-vector datatype (HO)

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)
))
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Package hyperref Info: Hyper figures OFF on input line 6347.
Package hyperref Info: Link nesting OFF on input line 6352.
Package hyperref Info: Hyper index ON on input line 6355.
Package hyperref Info: backreferencing OFF on input line 6362.
Package hyperref Info: Link coloring OFF on input line 6367.
Package hyperref Info: Link coloring with OCG OFF on input line 6372.
Package hyperref Info: PDF/A mode ON on input line 6375.
LaTeX Info: Redefining \ref on input line 6417.
LaTeX Info: Redefining \pageref on input line 6421.
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Package hyperref Info: Driver: hpdftex.
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Package uniquecounter Info: New unique counter `rerunfilecheck' on input line 2
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Package hyperref Info: Option `unicode' set `true' on input line 1463.

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Package: stringenc 2019/11/29 v1.12 Convert strings between diff. encodings (HO
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Package hyperref Info: Option `psdextra' set `true' on input line 1465.

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(d:/Program Files/texlive/2020/texmf-dist/tex/generic/colorprofiles/colorprofil
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(d:/Program Files/texlive/2020/texmf-dist/tex/generic/stringenc/se-pdfdoc.def
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(d:/Program Files/texlive/2020/texmf-dist/tex/latex/pdfx/AdobeColorProfiles.tex
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** pdfx: No file main.xmpdata . Metadata will be incomplete!
<<sRGB.icc>> (d:/Program Files/texlive/2020/texmf-dist/tex/latex/pdfx/8bit.def
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Package hyperref Info: Option `unicode' set `true' on input line 2411.
Package hyperref Info: Option `unicode' set `true' on input line 2412.

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Using XMP template file: pdfa.xmp
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! Text line contains an invalid character.
l.2175      \bgroup\nohyphenation#1\egroup^^^
                                             ^200b}}
? X
 
Here is how much of TeX's memory you used:
 19886 strings out of 480875
 320003 string characters out of 5904580
 566727 words of memory out of 5000000
 35302 multiletter control sequences out of 15000+600000
 536150 words of font info for 31 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 61i,0n,52p,908b,4779s stack positions out of 5000i,500n,10000p,200000b,80000s
No pages of output.

pdfTeX warning: pdflatex.exe: dangling objects discarded, no output file produc
ed.

PDF statistics:
 3 PDF objects out of 1000 (max. 8388607)
 0 named destinations out of 1000 (max. 500000)
 13 words of extra memory for PDF output out of 10000 (max. 10000000)

Best Answer

This is an unfortunate side effect of using the pdfx package.

A simpler example is

\documentclass{article}

\usepackage{pdfx}

\begin{document}

\iffalse

^^^^200b

\fi
\end{document}

You could make the catcode of character 30 normal (12) rather than invalid (15)

\documentclass{article}

\usepackage{pdfx}
\catcode30=12
\begin{document}

\iffalse

^^^^200b

\fi
\end{document}