Hi, I draw a figure using MetaFun and insert it \startplacefigure and \stopplacefigure. (Sample file is listed below) But, I got an error as following: Missing \endcsname inserted <to be read again> \defcsname <macro> \mult_interfaces_get_parameters_item_okay #1=#S#2,->\ifarguments \or \mult_interfaces_get_parameters_item_error {#1}\else \defcsname \m_mult_interfaces_namespace #1 \endcsname {#2}\fi <macro> \mult_interfaces_get_parameters_item #*#S#1,->\ifarguments \expandafter \gobbleoneargument \else \mult_interfaces_get_parameters_item_okay #1, If I remove "\startplacefigure and \stopplacefigure”, then there is no error, but the figure is not centered. Please tell me how to fix it. Thank you for reading. Best regards, Dalyoung \startbuffer[numbers] path p,q; p = unitsquare xyscaled(3,2) superellipsed .85 ; q := p scaled 1cm; draw q; label.bot(textext("\naturalnumbers"), point 2 of q); q := p scaled 1.5cm shifted (-.75cm,-.2cm); draw q ; label.bot(textext("\integers"), point 2 of q); q := p scaled 2cm shifted (-1.5cm,-.4cm); draw q; label.bot(textext("\rationals"), point 2 of q); q := p scaled 2.5cm shifted (-2.25cm,-.6cm); draw q; label.bot(textext("\reals"), point 2 of q); q := p scaled 3cm shifted (-3cm,-.8cm); draw q; label.bot(textext("\Bbb C"), point 2 of q); \stopbuffer \starttext \startplacefigure[location=none,\title=] {\scale[scale=1400]{\processMPbuffer[numbers]}} \stopplacefigure \stoptext