The code below shows a cyclic path that I am interested in creating (it is in red if you run the code). The example works fine as long as I have, u:=1cm, as in the code below. But if I replace it by , u:=0.6cm, there is no output. There is an error saying that paths 4 and 3 do not intersect. Is this a bug? Thanks for your help. \setuppapersize[letter][letter] \setuplayout[leftedge=0in,leftmargin=1in,leftmargindistance=0in,rightmargin=1in,rightmargindistance=0in,rightedge=0in,leftedgedistance=0in,rightedgedistance=0in,topspace=0.5in,width=6.5in,height=10in] \setupcolors[state=start] \starttext \startuseMPgraphic{buildS22} numeric u; u := 1cm; w:= 2pt; path xaxis; path yaxis; xaxis := (0,0)--(12,0) scaled u; yaxis := (0,0)--(0,12) scaled u; path stLine; path Curve; stLine := function (1,"x","10-x",0,10,1) scaled u; Curve := function(1,"x","2+8/x",1,10,0.1) scaled u; drawarrow xaxis withpen pencircle scaled w; drawarrow yaxis withpen pencircle scaled w; draw stLine withpen pencircle scaled w withcolor 0.5red; draw Curve withpen pencircle scaled w withcolor 0.5green; pair Lint[]; Lint[1]:=yaxis intersectionpoint stLine; Lint[2]:=stLine intersectionpoint Curve; Lint[3]:=reverse stLine intersectionpoint Curve; Lint[4]:=stLine intersectionpoint xaxis; path cyclicPath; cyclicPath := buildcycle(Lint[1]--Lint[2],Curve,Lint[3]--Lint[4],reverse xaxis,yaxis); draw cyclicPath withpen pencircle scaled 5pt withcolor red; \stopuseMPgraphic \useMPgraphic{buildS22} \stoptext