Works fine here. Alan P.S. I simplified your code slightly: \definefloat [recipe] [figure] [default={right,none}] \setupbodyfont [pagella,9pt] \starttext \startplacerecipe \startMPcode pair vert[] ; numeric n ; n := 5 ; numeric radius ; radius := 2cm ; for i=0 upto n : vert[i] = radius * dir(360*i/(n+1)) ; endfor ; draw for i=0 upto n: vert[i] -- endfor cycle withcolor blue ; draw for i=0 upto n: vert[i] .. endfor cycle withcolor red ; draw origin--vert0 withcolor green ; draw origin--vert5 withcolor green ; draw origin--.5[vert0,vert5] dashed evenly ; label.urt("C",vert1) ; %alternately: %draw textext.urt("C") shifted vert1 ; \stopMPcode \stopplacerecipe \input knuth \stoptext On Thu, 31 Dec 2015 17:46:35 +0100 Fabrice Couvreur wrote:

Hello, The code below works perfectly without the placement of the label, but if I want to place the label, it no longer works. Thank you

\definefloat [recipe] [figure]

\setupfloat [recipe] [default={right,none}]

\starttext

\switchtobodyfont [pagella, 9pt]

\placerecipe{}{

\startMPcode

pair vert[] ; n:=6 ; radius=2cm ; for i=0 upto n : vert[i] = radius * dir(360*i/n) ; endfor ;

draw for i=0 upto n-1: vert[i] -- endfor cycle withcolor blue ;

draw for i=0 upto n-1: vert[i] .. endfor cycle withcolor red ;

draw (0,0)--vert[0] withcolor green ;

draw (0,0)--vert[5] withcolor green ;

draw (0,0) --(vert[0]+vert[5])/2 dashed evenly ;

% label.urt("C",vert[1]) ;

\stopMPcode }

\input knuth

\stoptext

-- Alan Braslau CEA DSM-IRAMIS-SPEC CNRS UMR 3680 Orme des Merisiers 91191 Gif-sur-Yvette cedex FRANCE tel: +33 1 69 08 73 15 fax: +33 1 69 08 87 86 mailto:alan.braslau@cea.fr