Headline adjustment doesn't work after new installation

Question

Half a year ago, the following code

\documentclass[             fontsize=12pt,
% monochrome,
a4paper,               
parskip=half,      
ngerman,
headinclude=true,
footinclude=false,
captions=tableheading,
numbers=noenddot,
headings=big]
%chapterprefix=true]   % 
{scrreprt}

\usepackage[english,ngerman]{babel}
\usepackage[utf8]{inputenc}
\usepackage{color}
\usepackage{blindtext}
\usepackage{etoolbox}

% Define own Chapter style
% Pretty chapter pages
%------------------------------------------
\definecolor{nicered}{rgb}{.647,.129,.149}
\usepackage{soul}
\usepackage{pdfpages}

\makeatletter
\newsavebox{\feline@chapter}
\newcommand\feline@chapter@marker[1][4cm]{%
    \sbox\feline@chapter{%
        \resizebox{!}{#1}{\fboxsep=1pt%
            \colorbox{nicered}{\color{white}\bfseries\sffamily\thechapter}%
        }}%
        \rotatebox{90}{%
            \resizebox{%
                \heightof{\usebox{\feline@chapter}}+\depthof{\usebox{\feline@chapter}}}%
            {!}{\scshape\so\@chapapp}}\quad%
        \raisebox{\depthof{\usebox{\feline@chapter}}}{\usebox{\feline@chapter}}%
    }
    \newcommand\feline@chm[1][4cm]{%
        \sbox\feline@chapter{\feline@chapter@marker[#1]}%
        \makebox[0pt][l]{% aka \rlap
            \makebox[1cm][r]{\usebox\feline@chapter}%
        }}   

        \renewcommand*{\chapterformat}{%
            \hspace{\leftmargin} \feline@chm[2.5cm] % Height of the colored box
            \hspace{2cm}
        }

        \patchcmd{\@@makechapterhead}
        {\size@chapter{#1}}
        {\size@chapter{\parbox[b]{\dimexpr\textwidth-4cm\relax}{\raggedright#1}}}
        {}
        {}
        \makeatother
        %------------------------------------------

        \begin{document}


            \chapter{Lorem ipsum dolor sit amet, consectetuer adipiscing elit}
            \blindtext[2]
        \end{document}

created this document but no it seems that it doesn't work any more (I formated my pc and reinstalled Miktex and Texstudio) and now it looks like in this picture What can I do to get the old output back?

Answer 1

Recommendation

When you use \patchcmd, it is really important to put markers in for when things stop working e.g.

\patchcmd{\@@makechapterhead}
{\size@chapter{#1}}
{\size@chapter{\parbox[b]{\dimexpr\textwidth-4cm\relax}{\raggedright#1}}}
{\typeout{great}}
{\typeout{too bad}}

which shows you that the patch is not successful when you examine the output. (Usually, you should use something more informative than the above, of course, so you know what is wrong. But this is just for demonstration purposes.)

So, evidently the command you are patching has changed such that your patch no longer takes.

Explanation

The current definition of that command is:

\newcommand*{\@@makechapterhead}[1]{%
  \@tempskipa=\glueexpr \scr@chapter@sectionbeforeskip\relax
  \ifdim\@tempskipa<\z@\@tempskipa-\@tempskipa\fi
  \chapterheadstartvskip
  {%
    \setlength{\parindent}{\z@}\setlength{\parfillskip}{\fill}%
    \normalfont\sectfont\nobreak\nobreak\usekomafont{chapter}{}%
     \def\IfUseNumber{\ifnumbered{chapter}}%
    \if@chapterprefix
      \raggedchapter
      \let\IfUsePrefixLine\@firstoftwo
      \let\@tempa\@firstofone
    \else
      \let\IfUsePrefixLine\@secondoftwo
      \let\@tempa\@hangfrom
    \fi
    \@tempa{%
      \IfUseNumber{%
        \usekomafont{chapter}{%
          \IfUsePrefixLine{%
            {\usekomafont{chapterprefix}{%
                \chapterformat\chapterheadmidvskip
            }}%
          }{%
            \chapterformat
          }%
        }%
      }{}%
    }%
    {%
      \IfUsePrefixLine{}{\raggedchapter}%
      \interlinepenalty \@M
      \usekomafont{chapter}{#1}\par
    }%
  }%
  \nobreak\par\nobreak
  \@tempskipa=\glueexpr \scr@chapter@sectionafterskip\relax
  \ifdim\@tempskipa<\z@\@tempskipa-\@tempskipa\fi
  \chapterheadendvskip
}

So \size@chapter{#1} is no longer used and etoolbox cannot find anything to patch.

Patch

Probably, you want something more like this:

\patchcmd{\@@makechapterhead}
{\usekomafont{chapter}{#1}}
{\parbox[b]{\dimexpr\textwidth-4cm\relax}{\raggedright\usekomafont{chapter}{#1}}}
{\typeout{great}}
{\typeout{too bad}}
\makeatother