problem with scrpage2 and coloured borders

Question

I'm trying to do this

\usepackage{scrpage2}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}
\usetikzlibrary{calc}
%\usetikzlibrary{intersections}
%\tikzset{variable/.default=}  
\newcommand{\pageframe}{%
    \begin{tikzpicture}[remember picture, overlay]
       % page frame
        \fill[red](current page.north west) rectangle (current page.south east);
        \fill[white,rounded corners=1cm]($(current page.north west)+%(1cm,-1cm)$) rectangle ($(current page.south east)+(-1cm,4cm)$);
%       \node[fill=green,text width=1.5cm,text centered] 
%           at ($(current page.south)+(0,4cm)$){\strut\pagemark};
%%       \strut gives all page mark nodes the same hight.  
   \end{tikzpicture}
}
% set page style
\cehead[\pageframe]{\pageframe}
\cohead[\pageframe]{\pageframe}
\pagestyle{scrheadings}

but it fails to compile:

! Argument of \tikz@cc@parse@factor has an extra }.

I don't get it; if I comment the last line, \pagestyle{scrheadings}, it compiles, though output remains unmodified...

Answer 1

Remove the percent sign % in the second fill line. Here's a compilable version:

\documentclass{scrbook}
\usepackage{scrpage2}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}
\usetikzlibrary{calc}
\newcommand{\pageframe}{%
    \begin{tikzpicture}[remember picture, overlay]
       % page frame
        \fill[red](current page.north west) rectangle (current page.south east);
        \fill[white,rounded corners=1cm]($(current page.north west)
            +(1cm,-1cm)$) rectangle ($(current page.south east)+(-1cm,4cm)$);
   \end{tikzpicture}
}
% set page style
\cehead[\pageframe]{\pageframe}
\cohead[\pageframe]{\pageframe}
\pagestyle{scrheadings}

\begin{document}
\tableofcontents
\addchap{Introduction}
\newpage
\chapter{First chapter}
\chapter{Second chapter}
\end{document}