Here's a workaround.
dt = Open( "$SAMPLE_DATA/big class.jmp" );
grp = dt << Graph Builder(
Size( 528, 464 ),
Show Control Panel( 0 ),
Variables( X( :name ), Y( :height ) ),
Elements( Bar( X, Y, Legend( 6 ) ) )
);
aa = Report(grp);
aa << Save HTML("$temp\grp.html");
/* repair the html
<!doctype html public "-//W3C//DTD HTML 4.0//EN">
<html><head><title>
JMP Report
</title><style>
body { font-family: Arial, sans-serif; font-size: 12px; padding: 0; margin: 10px; }
table { border-color: #a9a9a9; border-collapse: collapse; }
td,th { border-color: #a9a9a9; }
img { border: 1px solid #a9a9a9; } <<<<<<<<<<<< this causes the border
h1,h2,h3,h4,h5 { padding: 0; margin: 5px 0px; }
</style>
</head><body>
<img src="gfx/image37489392371.png" width=637 height=471><br>
</body></html>
*/
htmlTxt = loadtextfile("$temp\grp.html");
htmlTxt = regex(htmlTxt, "img \{ border: 1px solid #a9a9a9; \}", "", GLOBALREPLACE);
savetextfile("$temp\grp.html",htmlTxt);
open("$temp\grp.html");
The problem is with the generated HTML; it includes a style to draw the outline around the picture. This seems to work in JMP 14...17. No promises.
Craige