Fdzfgy

I have a 40 page long document that works fine for the most part, but starts having heaps of errors on different lines by the end. The document has a total of 42 errors, happening on several lines, and one line usually has 10-15 errors. The document compiles fine, and it looks as it's supposed to, but it still bothers me to have the errors, and why I have them, so help would be appreciated.

I simplified the document to share here, as requested by comments, and now it looks like this:

documentclass[a4paper,11pt,pdftex]{article}



usepackage[utf8]{inputenc}

usepackage[magyar]{babel} %needed in Hungarian reports

usepackage{fancyhdr} %for the nice header

usepackage{graphicx} %grapics input

usepackage{tikz} %tikz figures

usepackage[colorinlistoftodos]{todonotes}

renewcommand{baselinestretch}{1.5}



usepackage{amsmath}

usepackage{amsthm}

usepackage{amssymb}

usepackage{braket}

usepackage{caption}

usepackage{subcaption}

usepackage[colorinlistoftodos]{todonotes} % szövegbeli kommentekhez, szövegdobozokhoz

usepackage{comment} %többsoros kommentekhez

usepackage{textgreek} %görög betűk math mode-on kívül

usepackage{fixltx2e} % felső és alsó indexekhez

usepackage{siunitx} %szép celsius jelért

usepackage{t1enc} %mert kéri...

%usepackage[justification=centering]{caption} %hogy a képaláírások középen legyenek

usepackage{array} % hogy a táblázat oszlopainak szélességét állítsam

usepackage{tabu} % ez meg auomatikusan kitölti a táblázatot oldalszélesre



usepackage[a4paper,left=2.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm,pdftex]{geometry} %margins



usepackage{color}

usepackage{xcolor}

usepackage{url}

usepackage{hyperref} %links

hypersetup{

colorlinks=true,

linkcolor=blue,

urlcolor=blue,

citecolor=red,

unicode=true

}



begin{document}

pagestyle{fancy}



section{Resultslabel{results}}



clearpage



end{document}

This version has 13 errors, all on line 47 (the clearpage line). Here are the errors I'm getting:

! Undefined control sequence.

bbl@fixname #1->begingroup def bbl@tempe 

                                             {l@}edef bbl@tempd {noexpand...

l.47 clearpage



The control sequence at the end of the top line

of your error message was never def'ed. If you have

misspelled it (e.g., `hobx'), type `I' and the correct

spelling (e.g., `Ihbox'). Otherwise just continue,

and I'll forget about whatever was undefined.



! Argument of bbl@tempd has an extra }.

<inserted text> 

                par 

l.47 clearpage



I've run across a `}' that doesn't seem to match anything.

For example, `defa#1{...}' and `a}' would produce

this error. If you simply proceed now, the `par' that

I've just inserted will cause me to report a runaway

argument that might be the root of the problem. But if

your `}' was spurious, just type `2' and it will go away.



Runaway argument?

{noexpand @ifundefined {noexpand bbl@tempe languagename }}bbl@tempd ETC.

! Paragraph ended before bbl@tempd was complete.

<to be read again> 

                   par 

l.47 clearpage



I suspect you've forgotten a `}', causing me to apply this

control sequence to too much text. How can we recover?

My plan is to forget the whole thing and hope for the best.



! Use of begingroup doesn't match its definition.

<to be read again> ...MAGYAR{{1}}begingroup def 

                                                  {L@}edef par 

l.47 clearpage



If you say, e.g., `defa1{...}', then you must always

put `1' after `a', since control sequence names are

made up of letters only. The macro here has not been

followed by the required stuff, so I'm ignoring it.



! Missing { inserted.

MakeUppercase  ... {uppercase {#1}}reserved@a }



l.47 clearpage



Where was the left brace? You said something like `defa}',

which I'm going to interpret as `defa{}'.



! Missing } inserted.

<inserted text> 

                }

l.47 clearpage



I've inserted something that you may have forgotten.

(See the <inserted text> above.)

With luck, this will get me unwedged. But if you

really didn't forget anything, try typing `2' now; then

my insertion and my current dilemma will both disappear.



! Extra }, or forgotten endgroup.

@begin@tempboxa ...begingroup #2color@endgroup }

                                                  def width {wd @tempbox...

l.47 clearpage



I've deleted a group-closing symbol because it seems to be

spurious, as in `$x}$'. But perhaps the } is legitimate and

you forgot something else, as in `hbox{$x}'. In such cases

the way to recover is to insert both the forgotten and the

deleted material, e.g., by typing `I$}'.



! Extra }, or forgotten endgroup.

<argument> ...adwidth }{raggedleft f@nch@orh }}}

                                                  headrule 

l.47 clearpage



I've deleted a group-closing symbol because it seems to be

spurious, as in `$x}$'. But perhaps the } is legitimate and

you forgot something else, as in `hbox{$x}'. In such cases

the way to recover is to insert both the forgotten and the

deleted material, e.g., by typing `I$}'.



! You can't use `hrule' here except with leaders.

headrule ...width plainheadrulewidth fi hrule 

                                                  @height headrulewidth @...

l.47 clearpage



To put a horizontal rule in an hbox or an alignment,

you should use leaders or hrulefill (see The TeXbook).



! Missing number, treated as zero.

<to be read again> 

                   vskip 

l.47 clearpage



A number should have been here; I inserted `0'.

(If you can't figure out why I needed to see a number,

look up `weird error' in the index to The TeXbook.)



! Illegal unit of measure (pt inserted).

<to be read again> 

                   vskip 

l.47 clearpage



Dimensions can be in units of em, ex, in, pt, pc,

cm, mm, dd, cc, nd, nc, bp, or sp; but yours is a new one!

I'll assume that you meant to say pt, for printer's points.

To recover gracefully from this error, it's best to

delete the erroneous units; e.g., type `2' to delete

two letters. (See Chapter 27 of The TeXbook.)



! Missing } inserted.

<inserted text> 

                }

l.47 clearpage



I've inserted something that you may have forgotten.

(See the <inserted text> above.)

With luck, this will get me unwedged. But if you

really didn't forget anything, try typing `2' now; then

my insertion and my current dilemma will both disappear.



! Missing endgroup inserted.

<inserted text> 

                endgroup 

l.47 clearpage



I've inserted something that you may have forgotten.

(See the <inserted text> above.)

With luck, this will get me unwedged. But if you

really didn't forget anything, try typing `2' now; then

my insertion and my current dilemma will both disappear.



! Missing } inserted.

<inserted text> 

                }

l.47 clearpage



I've inserted something that you may have forgotten.

(See the <inserted text> above.)

With luck, this will get me unwedged. But if you

really didn't forget anything, try typing `2' now; then

my insertion and my current dilemma will both disappear.



! Missing } inserted.

<inserted text> 

                }

l.47 clearpage



I've inserted something that you may have forgotten.

(See the <inserted text> above.)

With luck, this will get me unwedged. But if you

really didn't forget anything, try typing `2' now; then

my insertion and my current dilemma will both disappear.



! Extra }, or forgotten endgroup.

@outputpage ...or hb@xt@ textwidth {@thehead }

                                                  color@endbox }dp @tempb...

l.47 clearpage



I've deleted a group-closing symbol because it seems to be

spurious, as in `$x}$'. But perhaps the } is legitimate and

you forgot something else, as in `hbox{$x}'. In such cases

the way to recover is to insert both the forgotten and the

deleted material, e.g., by typing `I$}'.

Not sure if it matters, but I'm writing in an online editor (overleaf).

You should load fancyhdr before babel when the option magyar is used (as directed by a warning issued by the language definition file). However, this conflicts somehow with MakeUppercase.

Either you redefine sectionmark to avoid it, or load textcase with the overload option.

documentclass[a4paper,11pt]{article}



usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{fancyhdr} %for the nice header

usepackage[magyar]{babel} %needed in Hungarian reports

usepackage{graphicx} %grapics input

usepackage{tikz} %tikz figures

usepackage[colorinlistoftodos]{todonotes}



usepackage{amsmath}

usepackage{amsthm}

usepackage{amssymb}

usepackage{braket}

usepackage{caption}

usepackage{subcaption}

usepackage[colorinlistoftodos]{todonotes} % szövegbeli kommentekhez, szövegdobozokhoz

usepackage{comment} %többsoros kommentekhez

usepackage{textgreek} %görög betűk math mode-on kívül

%usepackage{fixltx2e} % felső és alsó indexekhez

usepackage{siunitx} %szép celsius jelért

%usepackage{t1enc} %mert kéri...

usepackage[justification=centering]{caption} %hogy a képaláírások középen legyenek

usepackage{array} % hogy a táblázat oszlopainak szélességét állítsam

usepackage{tabu} % ez meg auomatikusan kitölti a táblázatot oldalszélesre

usepackage[overload]{textcase}



usepackage[

  a4paper,

  left=2.5cm,

  right=2.5cm,

  top=2.5cm,

  bottom=2.5cm,

  headheight=13.6pt,

]{geometry} %margins



%usepackage{color}

usepackage{xcolor}

%usepackage{url}

usepackage{hyperref} %links

hypersetup{

  colorlinks=true,

  linkcolor=blue,

  urlcolor=blue,

  citecolor=red,

  unicode=true

}



renewcommand{baselinestretch}{1.5}

pagestyle{fancy}



begin{document}



section{Resultslabel{results}}



clearpage



end{document}

I also made a few changes: I removed the option pdftex everywhere, which should not generally be used; instead of t1enc it's better to load fontenc; loading color is useless if xcolor is used; fixltx2e is included in the latest releases of LaTeX; url is loaded by hyperref.

Finally, I added a setting to headheight, as directed by fancyhdr.