Weird invalid character error [closed]

I get this weird error with this code and I have no idea why:

! Text line contains an invalid character.
l.45 ^^@
^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^@^^...
A funny symbol that I can't read has just been input.
Continue, and I'll forget that it ever happened.


I already tried removing the aux. file, but that did not help. I can't find a character that might cause this error.

\documentclass[12pt,a4]{report}

\usepackage{lipsum}
\usepackage[margin=2cm,left=2.5cm,right=1.5cm,includefoot]{geometry} % defines margin of all pages of the thesis
\usepackage[onehalfspacing]{setspace} % sets the line spacing to one and a half
\usepackage{hyperref}
\usepackage[final]{graphicx}
\usepackage{subcaption} % for multiple figures in one figure tab
\listfiles
\usepackage{float}

\usepackage[toc,page]{appendix}

\usepackage{titlesec} %for subsubsub sections
\setcounter{secnumdepth}{4}
\titleformat{\paragraph}
{\normalfont\normalsize\bfseries}{\theparagraph}{1em}{}
\titlespacing*{\paragraph}
{0pt}{3.25ex plus 1ex minus .2ex}{1.5ex plus .2ex}

\usepackage{amsmath} % needed for mathematical symbols like °C
\usepackage{siunitx}

\usepackage{bm} %enables to make math bolf faced
\usepackage{longtable}
\usepackage{booktabs}
\begin{document}

\begin{table}[htbp]
\centering
\begin{tabular}{rrrrrrrrrrr}
\toprule
Sample & Humidity & Solvent & Concentration & Distance & Feedrate & Voltage & Volume & Molecular Weight & Date  & comments \\
\midrule
&       &       & [wt \%] & [cm]  & [$\mu$l/min] & [kv]  & [ml]  &       &       &  \\
1     & 40    & 2 DMAC :3 Acetone & 20    & 11    & 6     & 26.5  &       & 530,000 & 16.10.2015 &  \\
2     & 40    & 2 DMAC :3 Acetone & 20    & 14    & 10    & 26.5  &       & 530,000 & 16.10.2015 &  \\
3     & 40    & 2 DMAC :3 Acetone & 20    & 20    & 10    & 26.5  &       & 530,000 & 16.10.2015 &  \\
4     & 40    & 2 DMAC :3 Acetone & 20    & 23    & 80    & 25    &       & 530,000 & 16.10.2015 &  \\
5     & 40    & 2 DMAC :3 Acetone & 20    & 12    & 3     & 18    &       & 530,000 & 22.10.2015 &  \\
6     & 50    & 7 DMF : 3 Acetone & 17    & 10    & 3     & 20    &       & 530,000 & 23.10.2015 & PVDF turned yellow/ degraded, maybe temperature was too high \\
7     & 50    & 7 DMF : 3 Acetone & 17    & 10    & 3     & 21    &       & 530,000 & 23.10.2015 & PVDF turned yellow/ degraded, maybe temperature was too high \\
8     & 50    & 2 DMAC :3 Acetone & 15    & 10    & 3     & s     &       & 530,000 & 27.10.2015 &  \\
9     & 49    & 2 DMAC :3 Acetone & 20    & 13    & 6     & 24    &       & 530,000 & 29.10.2015 &  \\
10    & 49    & 2 DMAC :3 Acetone & 20    & 15    & 6     & 24    &       & 530,000 & 29.10.2015 &  \\
11    & 55    & 2 DMAC :3 Acetone & 20    & 18    & 6     & 20    &       & 530,000 & 30.10.2015 &  \\
12    & 55    & 2 DMAC :3 Acetone & 20    & 18    & 6     & 25    &       & 530,000 & 30.10.2015 &  \\
13    & 50    & 2 DMAC :3 Acetone & 15    & 18    & 8     & 25    & 1     & 530,000 & 4.11.2015 &  \\
14    & 50    & 2 DMAC :3 Acetone & 15    & 15    & 8     & 25    & 0.5   & 530,000 & 4.11.2015 &  \\
15    & 50    & 3 DMAC :7 Acetone & 15    & 15    & 8     & 25    & 0.5   & 530,000 & 5.11.2015 &  \\
16    & 50    & 3 DMAC :7 Acetone & 15    & 15    & 8     & 15    & 0.5   & 530,000 & 5.11.2015 &  \\
17    & 50    & 3 DMAC :7 Acetone & 15    & 10    & 8     & 13    & 0.5   & 530,000 & 5.11.2015 & voltage adjusted till i got a stable Taylor's cone \\
18    & 50    & 3 DMAC :7 Acetone & 15    & 18    & 8     & 16    & 1     & 530,000 & 5.11.2015 & voltage adjusted till i got a stable Taylor's cone \\
19    & 55    & 3 DMAC :7 Acetone & 15    & 15    & 8     & 15    & 0.5   & 530,000 & 10.11.2015 &  \\
20    & 53    & 3 DMAC :7 Acetone & 15    & 16    & 8     & 15    & 0.5   & 530,000 & 10.11.2015 &  \\
21    & 51    & 3 DMAC :7 Acetone & 15    & 16    & 8     & 14    & 0.5   & 530,000 & 10.11.2015 &  \\
22    & 46    & 3 DMAC :7 Acetone & 15    & 20    & 8     & 15    &       & 530,000 & 12.11.2015 & thick needle \\
23    & 46    & 3 DMAC :7 Acetone & 15    & 17    & 8     & 13    &       & 530,000 & 12.11.2015 & thick needle \\
24    & 46    & 3 DMAC :7 Acetone & 15    & 16    & 8     & 12.4  &       & 530,000 & 12.11.2015 & thick needle \\
25    & 46    & 3 DMAC :7 Acetone & 15    & 17    & 8     & 13.1  &       & 530,000 & 12.11.2015 &  \\
26    & 46    & 3 DMAC :7 Acetone & 15    & 16    & 8     & 12.6  &       & 530,000 & 12.11.2015 &  \\
27    & 46    & 3 DMAC :7 Acetone & 15    & 15    & 8     &      &       & 530,000 & 12.11.2015 &  \\

\bottomrule
\end{tabular}%
\end{table}%

\end{document}


closed as off-topic by egreg, user13907, user31729, darthbith, WernerMay 5 '16 at 22:15

• This question does not fall within the scope of TeX, LaTeX or related typesetting systems as defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

• Your code compiles fine for me (and produces a poorly cropped table). What distribution of TeX are you using? – Jānis Lazovskis May 5 '16 at 14:06
• @jlv It may compile fine because all those weird characters are “cleaned” or normalized by this site when OP copied code to the question. – Manuel May 5 '16 at 14:17
• I just copied the table from here back to texmaker and it works now! So strange. Thanks guys! – Sir Isacson May 5 '16 at 14:25
• ^^@ is tex syntax for byte 0 ie as ASCII NULL character which is usually a sign of filesystem corruption somewhere., – David Carlisle May 5 '16 at 14:25
• I'm voting to close this question as off-topic because the issue cannot be reproduced and is probably caused by a misfeature of the OP's editor – egreg May 5 '16 at 21:17