Dear Hans,

I run the following code which is in page 24,25 luametafun.pdf.

1. adding \starttext and \stoptext, it works fine. No overlapping. 
Also, functionstyle = “math” is working nicely.

2. removing \starttext and \stoptext, then functionstyle =“math” invoked an error.

3. removing \starttext, \stoptext, and functionstyle=“math”, it worked. However the caption 
“x=[…]; 	y=[….]” is overlapped.

%\starttext
\startMPcode{doublefun} 
draw lmt_contour [
xmin = 0, xmax = 4*pi, xstep = .05,
ymin = -6, ymax = 6, ystep = .05,
levels = 7,
height = 5cm,
preamble = "local sin, cos = math.sin, math.cos",
function = "cos(x)+sin(y)",
%functionstyle = "math",
background = "bitmap",
foreground = "edge",
linewidth = 1/2,
cache = true,
]; 
\stopMPcode
%\stoptext


Thank you so much.

Best regards,

Dalyoung