Btukfyl

I have this code:

documentclass[border=5mm]{standalone}



usepackage{tikz}



usetikzlibrary{matrix}

usetikzlibrary{positioning}



newcommand{listbcs}[4]{

    tikzset{

        barycentric setup/.code={foreach X [count=Y] in {#1}

            {ifnumY=1

                    xdefbaryarg{X=1}

                else

                    xdefbaryarg{baryarg,X=1}

                fi}},

        barycentric list/.style={barycentric setup={#1},insert path={%

                (barycentric cs:baryarg)}}

    }

    path[barycentric list={#1}] node[anchor=center,align=flush center,#2] (#3) {#4};

}



newcommand{multilinks}[4]{%

    begin{scope}[x=1em,y=1em]

        listbcs{#2}{}{bcright}{}

        newdimenxright

        newdimenybc

        newdimendump

        path(bcright);

        pgfgetlastxy{dump}{ybc}

        path(-1,0);

        newdimenxtemp

        pgfgetlastxy{xtemp}{dump}

        foreach ver in {#2}{

            newdimenxnow

            path(ver.west);

            pgfgetlastxy{xnow}{dump}

            ifdimxnow<xtemp

                path(ver.west);

                pgfgetlastxy{xtemp}{dump}

        }

        coordinate (midright) at ({xtemp-#3 em},ybc);

        coordinate (midleft) at ({xtemp-#3 em-#4 em},ybc);

        foreach i in {#1} {

            foreach j in {#2}{

                newdimenystart 

                path (i.east);

                pgfgetlastxy{dump}{ystart}

                newdimenymid

                path (midleft);

                path (midright);

                pgfgetlastxy{dump}{ymid}

                newdimenyend

                path (j.west);

                pgfgetlastxy{dump}{yend}

                ifdimystart=ymidrelax%

                    ifdimymid=yendrelax%

                        draw[->] (i.east)--(j.west);%

                    else%

                        draw[->,rounded corners] (i.east)--(midright)--(j.west);%

                    fi%

                else%

                    ifdimymid=yendrelax%

                        draw[->] (i.east)--(midleft)--(j.west);%

                    else%

                        draw[->,rounded corners] (i.east)--(midleft)--(midright)--(j.west);%

                    fi%

                fi%

            }

        }

    end{scope}

}



begin{document}

    tikzset{

        basic/.style={

            draw, 

            rounded corners=2pt, 

            thick, 

            text width=8em, 

            align=flush center,

            node distance=2em

        }

    }

    begin{tikzpicture}

        matrix[row sep=2em, column sep=4em, every node/.style={basic}] {

            node(a){text}; & node(c){text}; \

            node(b){text}; & node(d){text}; \

            node(e){text}; & node(f){text}; \

        };

        multilinks{b,e}{d,f}{1}{1}

    end{tikzpicture}

end{document}

It tells me Incomplete iffalse; all text was ignored after line <multilinks{b,e}{d,f}{1}{1}>.

What did I do wrong?